hey ade numerous voy- When the cardboard helix is as dry as it can gon, with two sides of equal length intersecting at the ages during the ninth, tenth, and eleventh centuries. made a zero inark is drawn opposite the point of t- acute angle and two other sides of equal length inter- The great lug… … Fig. 1—SIMPLE HYGROSCOPE, about humidity. This means great discomfort to almost every one. mentis placed in a steamy atmosphere until the in- To be really comfortable on a hot summer’s day we dex has moved as far as it will go from the zero mark ; do not need shade, cooling drinks, and fans so much…
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