Magic Books & Paper Toys: Flip Books, E-Z Pop-Ups & Other Paper Playthings to Amaze & Delight

John Boardman (Author)

Corpus Vasorum Antiquorum: Great Britain, Fascicule 15castle Ashby, Northampton

James Smith Rudolph

Make Your Own Working Paper Clock

Clocksby Isaac AsimovThrough most of history, people hardly felt the need of clocks. It seemed sufficient to consult one's own physiology to tell when one was hungry or sleepy, or to observe the general position of the sun in the sky during the day or that of the Big Dipper at night.Those who were meticulous enough to want something better searched for some regular motion that existed in nature or that could be contrived. In ancient times, the sundial was invented so that the passage of the shadow of a rod could be followed as the sun crossed the sky.Or else one could observe the extent to which a candle burned downward, or wait till a certain amount of sand had sifted through a small opening. Such devices could be used on cloudy days or at night, when the sun could not be seen and shadows were not observed.In ancient times, the best timepiece was the clepsydra, or water clock, which measured time by the regular dripping of water through a narrow opening. As water accumulated in the lower reservoir, a float carrying a pointer rose and marked the hours. The best water clocks were quite elaborate but few in number and fragile. They could not be relied on to tell time more closely ...

Bill Phillips

The Complete Book of Locks and Locksmithing

@lt;b@gt;Featuring an all-new test for the RPL exam!@lt;p@gt;THE MOST COMPLETE LOCKSMITHING GUIDE YOU CAN FIND@lt;/b@gt;@lt;br@gt;Whether you want to learn lockpicking or locksmithing -- or want to choose locks that are virtually impossible to defeat -- Bill Phillips' classic @lt;i@gt;The Complete Book of Locks and Locksmithing@lt;/i@gt; is perfect. For years the top reference in the field, this book suits everyone from beginners who want to master techniques step by illustrated step, to pros who need an up-to-date, all-inclusive shop manual. This an insider's guide to every facet of the world of mechanical security.@lt;p@gt;Great for independent or classroom study, the Sixth Edition features: @lt;ul@gt;@lt;li@gt;Comprehensive illustrated coverage from a master locksmith@lt;li@gt;The perfect tool for teaching yourself lockpicking and lock fixing@lt;li@gt;Buying and selling safes@lt;li@gt;Coverage of electronic and high-security mechanical locks@lt;li@gt;Auto lock opening and servicing how-to's@lt;li@gt;Lockmaking instructions@lt;li@gt;An all new registered professional locksmith exam@lt;li@gt;Lists of tool and equipment sources@lt;li@gt;PLUS NEW instruction on key impressioning; ...