e as shown on the dial, at the same time cheapness, as the disulphide costs only 9 for the time equation and the local longi- cents a pound and an ounce suffices to fumi- tude. This is done quite mechanically so as The Adjusting Scale of the Sun Dial, gate a box of 70 cubic feet capacity. to pass… … traced on the scale are proportional to cor- Par worse is the Lepisma, or "silver fish," so-called from its shape and shining scales. responding values of the time equation. At A NEW SUN DIAL. It is a little wingless insect of the order each end of the scale are placed two gradua- tions in minutes…
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