356 THE MICROSCOPE. 
the chloride of gold, my assertion will hold good. I empnasize 
that we see none other but branching and interconnecting “cells,” 
their offshoots being of two kinds; some broad, others narrow 
and thread-like. The light fields of a pale violet tint and finely 
eranular, correspond, as is generally admitted, to the so-called 
intercellular or basis substance. 
Now we apply a magnifying power of five hundred diameters. 
Again we recognize the dark violet, branching cornea cells pro- 
ducing a comparatively coarse reticulum throughout the lamella. 
One feature, however, has now become conspicuous, viz., that the 
“cornea cells” are not sharpiy bordered toward the surrounding 
basis-substance, neither are the broad offshoots emanating from 
them in varying numbers. Furthermore, we see a dark violet, 
almost rectangular network within the cornea cells as well as 
their broad offshoots. The nucleus in the centre of each cell, or 
rather at the broadest points of intersection of the coarse reticu- 
lum are, as a rule, paler in color and not very prominent. The 
fine filaments, likewise interconnecting the cornea cells, as stated 
above, now appear rosary-like, beaded, made up of irregularly 
alternating granules and threads. The intercellular substance 
appears distinctly granular, though not uniformly so, as some of 
the finest beaded threads will be seen penetrating here and there 
the basis-substance, as fine but short offshoots would penetrate 
the basis-substance from the borders of the dark violet corpus- 
cles. 
Select the thinnest lamella at your disposal, holding not more 
than one or, at the utmost, two layers of “cornea cells,” and 
place it under an immersion lens magnifying about one thous- 
and diameters. Any one in possession of an immersion lens of 
the late Mr Tolles, of Boston, may confidently use it, since these 
lenses, in my conviction, are superior to all made either in 
America or Europe. It will make no difference whether your 
lens is made for distilled water or for cedar oil. The homogene- 
ous lenses of Zeiss, so much in vogue now-a-days for bacteri- 
ological investigations, will answer our purpose, provided we re- 
move the Abbe condenser, this being almost indispensable for 
the study of bacteria, but worthless for histological research, as 
the abundance of light thus obtained, renders the minute feat- 
ures of tissues invisible. 
A new world is before us. What we see, is faithfully represented 
