# 3. clock and so adjust it that at eight the next morning the Vial, in consequence of a slightfstrain on the wire caused by the clock,would be inverted and would drop the a,cid on the chemicals below. This of course would cause an instant ignition,set afire the shavings and kindlings, and. when he would come to his school a little before nine, he would invariably find the fire going finely, and the schoolhouse nice and warm. a In the book I have before mentioned Muir gives me credit with having given him his first lesson in botany and which sent him to the woods and meadows to study God\u27s plant-world. To the same fact he alluded in a letter he wrote me seve...