108 THE MICROSCOPE. July 
signify that the examination was finished, the physicians 
desired to know if there were casts of any kind in the 
urine; without the aid of the microscope the examination 
would not have beensatisfactory. This important branch 
of chemistry, which duly belongs to the pharmacist and 
chemist, is almost entirely left to the physician, who, 
although acquainted with the theories and tests of the 
analysis, are not all masters of the science, either for want 
of time, lack of interest, or chemicals. Unless the phy- 
sician has a complete laboratory, proper attention is lost. 
If the pharmacist has no use for the microscope except 
in special branches, and has a good one at his disposal, he 
will derive many benefits from it through the physicians 
who patronize him and find that they can use it, as their 
work has a call for the instruments in many instances.—— 
Emil Ott in Bull. of Phar. 
Crystals of Sulphur.— Mr. A. P. Brown states that 
the formation ina glassy medium is well seen in rock, as 
osididian and pitchstone. This may be simulated with 
sulphur ina solution of balsam, or ina solution of carbon 
bisulphide (C S: ) mixed with balsam. The slide was pre- 
pared by heating together pure balsam and sulphur until 
a clear solution was obtained. Allowing this to cool, a 
milky substance was obtained, a small drop of which was 
placed on a slide and covered, and set aside for afew days. 
It is usual, in summer, that crystals appear; ifnot the slide 
may be heated almost to the melting point of the sulphur 
when the crystals will shortly be formed. When such a 
glassy material crystallizes, there is always a separation 
of a great multitude of globular bodies, the globules of H. 
Vogelgesang, who considers them the elementary bodies of 
crystals. They may assume various elongated shapes, the 
Trichilis margaritis of petrology. With the globules may 
be seen the so-called microlites or microscopic crystals. 
Around these there is, in each case, a _ little halo from 
globulites, showing the exhaustion of the solution by the 
formation of crystals, so that there remains no material 
to be deposited as globulite. 
