ts attacks. optical projector in a room that pe The results of his experiments is only partially darkened, which _ may be briefly summed up as greatly increases its utility and ~~ Sie i} follows: widens its scope. ee Rabbits can be successfully in- .The same firm have recently oculated without much… … the engraving of the improved in the most severe form the tem- polariscope. For the projection perature fell to normal and the of experiments in acoustics, op- animals recovered, while control tics, microscopy, physics, chemistry or spectrum analy- hand knitting machine shown in the illustration…
Internet Archive · Public domain (published before 1931). Free to use for anything.
