136 CATALOGUE OF THE MICROSCOPICAL SOCIETY. 
This extensive and valuable collection was chiefly formed 
by the late Professor Quekett, but has been considerably 
added to by the purchase of specimens from Dr. Tweedy J. 
Todd (of Brighton), and Mr. Nasmyth; also by a fine series 
illustrating the structure of the spinal cord, prepared by 
Leuhonek, in Lockhart Clarke’s method. In every drawer 
there are specimens of the greatest interest, and most are re- 
markable for the beautiful manner in which they have been 
prepared. The series of teeth is particularly fine, including 
the dental organs of all the groups of Vertebrata; and in- 
deed there is not a specimen in the whole collection which is 
not especially interesting, either on account of its rarity or 
the skilful manner in which it has been manipulated. 
During the past year, under the superintendence of Dr. 
Mury, the whole of the collection has undergone a careful 
examination, useless specimens have been rejected, and spe- 
cimens badly prepared have been remounted, whilst every 
object has been ticketed with its name, and with a number 
referring to a manuscript list, which it is hoped will soon be 
published. We may mention here that we observed that all 
the specimens in the collection were kept lying flat on the 
drawer, and not in racks. It is, we believe, most important 
that this arrangement should be universally adopted, as, in 
the course of time, almost any description of mounting will 
run if the slide be tilted. The histological collection of the 
Royal College of Surgeons is open for general inspection 
every Wednesday, and the student may gain access at other 
times. A microscope of first-rate quality and powers is 
placed ready for use, and every facility is afforded by the ex- 
cellent curators. 
The collection of the Microscopical Society of London is 
the only other collection of microscopic objects in London 
not entirely private. The catalogue of this collection, which 
has lately been published for the accommodation of members 
of the Society, 1s now before us. Though by no means so 
extensive a collection as that belonging to the Royal College 
of Surgeons, there are many series of specimens in it of much 
value, either on account of their rarity or as illustrating im- 
portant observations published in the Society’s ‘ Transactions’ 
or elsewhere. The total number of specimens is about 1300, 
and all are carefully ticketed and referred to in the Cata- 
logue. By far the greater part of the specimens have been 
presented to the Society by distinguished men of science, 
who have prepared the slides themselves in the course of 
their researches in various subjects where the microscope 
forms an important auxiliary of observation. Thus, we ob- 
