NOTES AND MEMORANDA. 
91 
Road, London, N. ; C. Baker, 244, High Holborn, London, W.C. ; 
Janies W. Queen and Co., 924, Chestnut Street, Philadelphia. Orders 
must be sent in, at latest, by September, 1875 ; in October the sub- 
scribers will be informed whether or not the book will be published. 
If the enterprise succeeds, each subscriber, by remitting the price to 
the undersigned or to one of the above-named gentlemen, will receive 
the book at the beginning of 1876. 
“ Wedel in Holstein (Germany).” ££ J • L). Moller. 
A Micro-Ophthalmoscope. — We learn from a contemporary that 
“ in order to facilitate the microscopical examination of the eye in 
cases of disease, M. Monoyer has contrived a modification of Siebel's 
ophthalmoscope, so arranged with prisms, that three persons can make 
simultaneous observations.” 
Dr. Fleming’s Section-Cutter. — With reference to this instrument 
(see p. 79) the following letter has been published in the ‘Lancet’ 
(July 3), from Mr. Lawson Tait: “A very serious objection to Dr. 
Fleming’s machine will at once occur to anyone who has done much work 
with the freezing method, in that the machine must require constant 
attention until the tissues are frozen and the sections are cut. In a 
University laboratory this is all very well ; but for workers who are at 
the same time subject to the exigencies of practice the machine will 
be a constant source of disappointment. In the last number of 
‘ Humphry and Turner’s Journal ’ I describe a new section-cutter, 
which obviates this objection. When the tissue has once been frozen, 
it will keep so for at least twelve hours, and for a week if the machine 
be placed in a Norwegian chamber. Having the section-cutter screwed 
to the table has not been found by me to be a disadvantage : but, on 
the contrary, a very great advantage, as it leaves both hands free — a 
matter of the greatest importance in cuttiug foetal sections, Wrhere the 
tissues are not continuous.” 
The Salmon Ova that were sent to New Zealand. — These ova 
were unsuccessful. That is to say, that the last shipment arrived in 
New Zealand dead. But what is worse is — if the officers of the 
Otago Association are to be believed — that microscopic examination 
showed that many of the eggs had not undergone any fertilization. 
It is strange that they should have arrived in a dead state, seeing 
that a large quantity of the ice alongside them remained unmelted on 
their arrival. 
Microscopy at the American Association. — The American Asso- 
ciation meets on the lltli of August, and it is endeavoured to get up a 
large amount of interest in the microscope. The ‘American Naturalist ’ 
(July) gives the following notice: A full representation of those 
interested in the microscope is especially desirable at the Detroit 
meeting of the A.A.A.S., commencing on the 11th of next August, as 
it is desired to take steps toward the organization of a Microscopical 
Society, either as a separate society or club, or as a subsection of the 
large Association. There is a very general desire for a society of 
American microscopists, and it is believed that such a society can 
VOL. XIV. H 
