CHARM OF MICROSCOPICAL STUDY.

This concludes the account of my very imperfect attempt to trace the life

history of a lowly plant. Its study has been to me a source of ever

increasing pleasure, and has again demonstrated how our favorite instrument

reveals phenomena of most absorbing interest in directions where the

unaided eye finds but little promise. In walking along the banks of the

little stream, where, half concealed by more pretentious plants, our humble

_Vaucheria_ grows, the average passer by, if he notices it at all, sees but

a tangled tuft of dark green "scum." Yet, when this is examined under the

magic tube, a crystal cylinder, closely set with sparkling emeralds, is

revealed. And although so transparent, so apparently simple in structure

that it does not seem possible for even the finest details to escape our

search, yet almost as we watch it mystic changes appear. We see the bright

green granules, impelled by an unseen force, separate and rearrange

themselves in new formations. Strange outgrowths from the parent filament

appear. The strange power we call "life," doubly mysterious when manifested

in an organism so simple as this, so open to our search, seems to challenge

us to discover its secret, and, armed with our glittering lenses and our

flashing stands of exquisite workmanship, we search intently, but in vain.

And yet _not_ in vain, for we are more than recompensed by the wondrous

revelations beheld and the unalloyed pleasures enjoyed, through the study

of even the unpretentious _Vaucheria_.

The amplification of the objects in the engravings is about 80 diameters.

* * * * *

JAPANESE CAMPHOR--ITS PREPARATION, EXPERIMENTS, AND ANALYSIS OF THE

CAMPHOR OIL.

[Footnote: From the Journal of the Society of Chemical Industry.]

Scientific American Supplement, No. 460, October 25, 1884 · 第 38 / 47 题