Journal of the Society of Mechanical Engineers

Journal of the Society of Mechanical Engineers

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Volume 32, Issue 147

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[title in Japanese]

Article type: Cover
1929 Volume 32 Issue 147 Pages Cover1-
Published: July 18, 1929
Released on J-STAGE: August 01, 2017

DOIhttps://doi.org/10.1299/jsmemagazine.32.147_Cover1

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[title in Japanese]

Article type: Appendix
1929 Volume 32 Issue 147 Pages App1-
Published: July 18, 1929
Released on J-STAGE: August 01, 2017

DOIhttps://doi.org/10.1299/jsmemagazine.32.147_App1

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MEASUREMENT OF STREAM VELOCITY BY AIR BUBBLES

Otogoro MIYAGI

Article type: Article
1929 Volume 32 Issue 147 Pages 305-313
Published: July 18, 1929
Released on J-STAGE: August 01, 2017

DOIhttps://doi.org/10.1299/jsmemagazine.32.147_305

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Air bubbles rise in still water with their respective constant terminal velocities as soon as they have started from nozzles, as the writer's former experiment shows. This has been found to be true also in flowing water, so that the displacement with which the bubble is carried down-stream with the water should be proportional to the mean velocity of the stream. This has led the writer to consider the possibility of making use of air bubbles for measuring the mean velocity of flowing water, especially to measure such a low velocity that scarcely any current meters can not be used for measuring it. The method of determining the sizes of bubbles has been shown and the empirical formulae for determining the mean stream velocity by making use of the bubbles has been deduced.

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AN EMPERICAL FORMULA FOR RECTANGULAR WEIRS WITH COMPLETE OR SLIGHTLY INCOMPLETE CONTRACTIONS

Iwao OKI

Article type: Article
1929 Volume 32 Issue 147 Pages 314-330
Published: July 18, 1929
Released on J-STAGE: August 01, 2017

DOIhttps://doi.org/10.1299/jsmemagazine.32.147_314

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In this paper an attempt is made to establish an empirical formula which covers all the results of the experiments ever made on rectangular weirs with complete or slightly incomplete contractions. The new proposed formula deduced from the results of experiments made by Frese, Steward and Long-well, Yendo, Francis, Fteley and Stearns, Hamilton enables us to compute the coefficients of discharge within an error not exceeding ± 15%, excepting abnormal cases. If the formula be a little modified, it becomes more suitable for shorter weirs. In the formula the complete contraction of the stream flowing over the weir is expressed by a function of the ratio of head to length of the weir. For the bottom effect on the contraction a correction factor involving the height of the crest above the channel bed is introduced. As hitherto has been done by some authors, the effect of viscosity on the vertical contraction, when the head is low, is expressed by a factor involving the reciprocal of head. Besides, the effect of the velocity of approach in the channel is, as usual, taken into account. The functions occurring in the formula are so chosen as to make them very simple in form, and the significant figures of the constants also are chosen as few as possible, so that it may be used very conveniently in practice.

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[title in Japanese]

[in Japanese]

Article type: Article
1929 Volume 32 Issue 147 Pages 237-239
Published: July 18, 1929
Released on J-STAGE: August 01, 2017

DOIhttps://doi.org/10.1299/jsmemagazine.32.147_237

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[title in Japanese]

[in Japanese]

Article type: Article
1929 Volume 32 Issue 147 Pages 239-243
Published: July 18, 1929
Released on J-STAGE: August 01, 2017

DOIhttps://doi.org/10.1299/jsmemagazine.32.147_239

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[title in Japanese]

[in Japanese]

Article type: Article
1929 Volume 32 Issue 147 Pages 243-245
Published: July 18, 1929
Released on J-STAGE: August 01, 2017

DOIhttps://doi.org/10.1299/jsmemagazine.32.147_243

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[title in Japanese]

[in Japanese]

Article type: Article
1929 Volume 32 Issue 147 Pages 245-246
Published: July 18, 1929
Released on J-STAGE: August 01, 2017

DOIhttps://doi.org/10.1299/jsmemagazine.32.147_245

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[title in Japanese]

[in Japanese]

Article type: Article
1929 Volume 32 Issue 147 Pages 246-251
Published: July 18, 1929
Released on J-STAGE: August 01, 2017

DOIhttps://doi.org/10.1299/jsmemagazine.32.147_246

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[title in Japanese]

[in Japanese]

Article type: Article
1929 Volume 32 Issue 147 Pages 251-252
Published: July 18, 1929
Released on J-STAGE: August 01, 2017

DOIhttps://doi.org/10.1299/jsmemagazine.32.147_251

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[title in Japanese]

[in Japanese]

Article type: Article
1929 Volume 32 Issue 147 Pages 252-254
Published: July 18, 1929
Released on J-STAGE: August 01, 2017

DOIhttps://doi.org/10.1299/jsmemagazine.32.147_252

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[title in Japanese]

[in Japanese]

Article type: Article
1929 Volume 32 Issue 147 Pages 254-256
Published: July 18, 1929
Released on J-STAGE: August 01, 2017

DOIhttps://doi.org/10.1299/jsmemagazine.32.147_254

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[title in Japanese]

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Article type: Article
1929 Volume 32 Issue 147 Pages 256-257
Published: July 18, 1929
Released on J-STAGE: August 01, 2017

DOIhttps://doi.org/10.1299/jsmemagazine.32.147_256

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[title in Japanese]

[in Japanese]

Article type: Article
1929 Volume 32 Issue 147 Pages 257-258
Published: July 18, 1929
Released on J-STAGE: August 01, 2017

DOIhttps://doi.org/10.1299/jsmemagazine.32.147_257

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[title in Japanese]

[in Japanese]

Article type: Article
1929 Volume 32 Issue 147 Pages 258-259
Published: July 18, 1929
Released on J-STAGE: August 01, 2017

DOIhttps://doi.org/10.1299/jsmemagazine.32.147_258

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[title in Japanese]

[in Japanese]

Article type: Article
1929 Volume 32 Issue 147 Pages 259-260
Published: July 18, 1929
Released on J-STAGE: August 01, 2017

DOIhttps://doi.org/10.1299/jsmemagazine.32.147_259

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[title in Japanese]

[in Japanese]

Article type: Article
1929 Volume 32 Issue 147 Pages 260-261
Published: July 18, 1929
Released on J-STAGE: August 01, 2017

DOIhttps://doi.org/10.1299/jsmemagazine.32.147_260

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[title in Japanese]

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Article type: Article
1929 Volume 32 Issue 147 Pages 261-264
Published: July 18, 1929
Released on J-STAGE: August 01, 2017

DOIhttps://doi.org/10.1299/jsmemagazine.32.147_261

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[title in Japanese]

[in Japanese]

Article type: Article
1929 Volume 32 Issue 147 Pages 264-268
Published: July 18, 1929
Released on J-STAGE: August 01, 2017

DOIhttps://doi.org/10.1299/jsmemagazine.32.147_264

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[title in Japanese]

[in Japanese]

Article type: Article
1929 Volume 32 Issue 147 Pages 268-269
Published: July 18, 1929
Released on J-STAGE: August 01, 2017

DOIhttps://doi.org/10.1299/jsmemagazine.32.147_268

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[title in Japanese]

[in Japanese]

Article type: Article
1929 Volume 32 Issue 147 Pages 269-
Published: July 18, 1929
Released on J-STAGE: August 01, 2017

DOIhttps://doi.org/10.1299/jsmemagazine.32.147_269_1

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[title in Japanese]

[in Japanese]

Article type: Article
1929 Volume 32 Issue 147 Pages 269-273
Published: July 18, 1929
Released on J-STAGE: August 01, 2017

DOIhttps://doi.org/10.1299/jsmemagazine.32.147_269_2

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[title in Japanese]

[in Japanese]

Article type: Article
1929 Volume 32 Issue 147 Pages 273-276
Published: July 18, 1929
Released on J-STAGE: August 01, 2017

DOIhttps://doi.org/10.1299/jsmemagazine.32.147_273

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[title in Japanese]

[in Japanese]

Article type: Article
1929 Volume 32 Issue 147 Pages 276-277
Published: July 18, 1929
Released on J-STAGE: August 01, 2017

DOIhttps://doi.org/10.1299/jsmemagazine.32.147_276

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[title in Japanese]

[in Japanese]

Article type: Article
1929 Volume 32 Issue 147 Pages 277-281
Published: July 18, 1929
Released on J-STAGE: August 01, 2017

DOIhttps://doi.org/10.1299/jsmemagazine.32.147_277

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[title in Japanese]

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Article type: Article
1929 Volume 32 Issue 147 Pages 281-287
Published: July 18, 1929
Released on J-STAGE: August 01, 2017

DOIhttps://doi.org/10.1299/jsmemagazine.32.147_281

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[title in Japanese]

[in Japanese]

Article type: Article
1929 Volume 32 Issue 147 Pages 287-289
Published: July 18, 1929
Released on J-STAGE: August 01, 2017

DOIhttps://doi.org/10.1299/jsmemagazine.32.147_287

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[title in Japanese]

[in Japanese]

Article type: Article
1929 Volume 32 Issue 147 Pages 289-291
Published: July 18, 1929
Released on J-STAGE: August 01, 2017

DOIhttps://doi.org/10.1299/jsmemagazine.32.147_289

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[title in Japanese]

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Article type: Article
1929 Volume 32 Issue 147 Pages 291-292
Published: July 18, 1929
Released on J-STAGE: August 01, 2017

DOIhttps://doi.org/10.1299/jsmemagazine.32.147_291

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[title in Japanese]

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Article type: Article
1929 Volume 32 Issue 147 Pages 292-293
Published: July 18, 1929
Released on J-STAGE: August 01, 2017

DOIhttps://doi.org/10.1299/jsmemagazine.32.147_292

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Article type: Article
1929 Volume 32 Issue 147 Pages 294-297
Published: July 18, 1929
Released on J-STAGE: August 01, 2017

DOIhttps://doi.org/10.1299/jsmemagazine.32.147_294

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Article type: Article
1929 Volume 32 Issue 147 Pages 297-299
Published: July 18, 1929
Released on J-STAGE: August 01, 2017

DOIhttps://doi.org/10.1299/jsmemagazine.32.147_297

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[title in Japanese]

[in Japanese]

Article type: Article
1929 Volume 32 Issue 147 Pages 299-300
Published: July 18, 1929
Released on J-STAGE: August 01, 2017

DOIhttps://doi.org/10.1299/jsmemagazine.32.147_299

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[title in Japanese]

Article type: Appendix
1929 Volume 32 Issue 147 Pages 301-
Published: July 18, 1929
Released on J-STAGE: August 01, 2017

DOIhttps://doi.org/10.1299/jsmemagazine.32.147_301

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[title in Japanese]

Article type: Appendix
1929 Volume 32 Issue 147 Pages 302-304
Published: July 18, 1929
Released on J-STAGE: August 01, 2017

DOIhttps://doi.org/10.1299/jsmemagazine.32.147_302

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[title in Japanese]

Article type: Appendix
1929 Volume 32 Issue 147 Pages 45-49
Published: July 18, 1929
Released on J-STAGE: August 01, 2017

DOIhttps://doi.org/10.1299/jsmemagazine.32.147_45

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[title in Japanese]

Article type: Appendix
1929 Volume 32 Issue 147 Pages 50-
Published: July 18, 1929
Released on J-STAGE: August 01, 2017

DOIhttps://doi.org/10.1299/jsmemagazine.32.147_50

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[title in Japanese]

Article type: Appendix
1929 Volume 32 Issue 147 Pages 51-52
Published: July 18, 1929
Released on J-STAGE: August 01, 2017

DOIhttps://doi.org/10.1299/jsmemagazine.32.147_51

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[title in Japanese]

Article type: Appendix
1929 Volume 32 Issue 147 Pages App2-
Published: July 18, 1929
Released on J-STAGE: August 01, 2017

DOIhttps://doi.org/10.1299/jsmemagazine.32.147_App2

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[title in Japanese]

Article type: Cover
1929 Volume 32 Issue 147 Pages Cover2-
Published: July 18, 1929
Released on J-STAGE: August 01, 2017

DOIhttps://doi.org/10.1299/jsmemagazine.32.147_Cover2

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[title in Japanese]

Article type: Cover
1929 Volume 32 Issue 147 Pages Cover3-
Published: July 18, 1929
Released on J-STAGE: August 01, 2017

DOIhttps://doi.org/10.1299/jsmemagazine.32.147_Cover3

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