The purpose of this paper is to examine one of the theoretical grounds of museum education, and I studied this program as a part of a study of art from the view of democracy. When citizens intend to produce the public sphere in the museum, in this article, I suggest on the significance of the concept of 'the museum as a forum'. So, I examined some papers of Duncan Cameron and some art works of Andrea Fraser. From this work, I suggest on the significance of dialogue as the key concept of museum education, which the museum as a forum seeks.

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It is difficult to spread the repellent agent uniformly on the surface of the substrate using the dilute solution which contains the least amount of repellent agent required theoretically, and the defects in the layer will result in insufficient repellency. Therefore, the excess amount of repellent agent is used for practical treatments.
The effects of dilution of the repellent solution and the application of surfactants on waterproofing were investigated, and the following results were obtained;
(1) The contact angle between a water drop and cellophane, and its resistance against washing and wearing does not deteriorate untill the concentration of repellent agent decreases to about a tenth of usually applied concentration. Below this range, the fluorochemical agent exhibits more rapid decrease of the contact angle than the silicone.
(2) The repellent effects are improved by repeated treatments with the solution of unsufficient concentration.
(3) The pretreatment with the solution of surfactant followed by drying over 100°C, recovers the deterioration due to the dilution of repellent agent and this recovery showed maximum between 0.001% and 0.01% of surfactant concentration. At the higher concentration, the levelling effect of surfactant fixed on the surface of substrate might be outweighed by the hydrophilic effect of the surplus surfactant.

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National Government Parks (NGPs) contain abundant nature such as the forest, the shore, the river and the country-side area. Therefore, NGPs have not only a function to supply recreation, but also roles to have users get close to natural environment and understand environmental conservation. It is said that ‘Interpretation (Ip)' is the effective park management technique for the function and roles. But Ip had not examined yet in comparison with associated fields such as natural parks, tourism, environmental education, museum, and urban parks. Though there is a difference uses of Ip, we can still find a commonality in application and development factors of Ip by contrast with associated fields. Consequently, this study shows that Ip is consists of four elements like Sender, Data, Medium and Receiver. In NGPs application and development circumstances of Ip is affected by multiple fields. For example, field trip, guided tour and environmental education programs are held. For this purpose, it is confirmed that following knowledge is development factors of Ip in NGPs help its: 1) to solve a problem in the park management, 2) to correspond to social needs.

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