Scientific amusements . ed to a riot. The French commander caused a counter irritant to beapplied, in the shape of thousands of eggs denying theprediction. The people did not know what to think ;thousands of eggs denied the accuracy of one. Besidesafter a while posters were placarded on the walls givingthe particulars and directions for working the means are very simple. Write your name or legend on the egg-shell on bees-waxor varnish, or even with tallow. Plunge the egg into aweak acid—vinegar will do, or diluted hydro-chloric acid,or aquafortis. Wherever the shell is not protecte
Scientific amusements . ed to a riot. The French commander caused a counter irritant to beapplied, in the shape of thousands of eggs denying theprediction. The people did not know what to think ;thousands of eggs denied the accuracy of one. Besidesafter a while posters were placarded on the walls givingthe particulars and directions for working the means are very simple. Write your name or legend on the egg-shell on bees-waxor varnish, or even with tallow. Plunge the egg into aweak acid—vinegar will do, or diluted hydro-chloric acid,or aquafortis. Wherever the shell is not protected bythe covering material it is decomposed, and the. design IchemistryWITHOUT A LABORATORY. IP3 Stands put in relief. There is no difficulty in this experi-ment, but some precautions are necies^ary. > As blown eggs are generally experipiented uponit will be necessary to close up the ends with yellow or?white wax ; aild as these eggs are necessarily very lightthey must be weighted to keep them in the acid bath, or. Fig. 84.—Manner of engraving an Egg. 1 held down with a glass rod. If the acid be very muchdiluted the operation, although it will occupy more time,will be more complete. Two or three hours will besufficient to bring ont th6 tracing. Thus the, miracle of the sorcerer has become anamusing and easy experiment in chemistry.
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Keywords: ., bookcentury1800, bookdecade189, booksubjectscientificrecreations
