watches evolved from portable spring-driven clocks, which first appeared in 15th century europe. watches were not widely worn in pockets until the 17th century. one account says that the word "watch" came from the old english word woecce which meant "watchman", because it was used by town watchmen to keep track of their shifts at work. another says that the term came from 17th century …
chemically, gutta-percha is a polyterpene, a polymer of isoprene, or polyisoprene, specifically (trans-1,4-polyisoprene).the cis structure of polyisoprene is the common latex elastomer.while latex rubbers are amorphous in molecular structure, gutta-percha (the trans structure) crystallizes, leading to a more rigid material.. historical uses
note: the following post accompanies takuan seiyo’s latest piece.both are being kept “sticky” until tonight. scroll down for other posts that have appeared since wednesday. certain posts at gates of vienna, among them those by takuan seiyo, tend to attract the attention and comments of people who are preoccupied with the jews.
(ed note: this article was written in 1979 and is admittedly a little dated. but most of it is still true.) the third industrial revolution is going to create two areas of concern and interest to military planners in the next thirty to ﬁfty years. one of these is new technology that will create new problems of defense and military operations.