1887.] MICROSCOPICAL JOURNAL. . 137 
constructed ‘life slide’ the animal was supplied with a current of fresh water and 
was thus kept in full vigor during the entire evening. 
The seed of the common California wild flower, Orthocarpus purpurescens, by A. S. 
Brackett. Each seed is inclosed by a delicate transparent latticed receptacle, thus 
presenting a charming appearance when well illuminated. 
The exhibit of A. H. Breckenfeld comprised double stained sections of the human 
scalp, both vertical and horizontal, thus giving an excellent idea of its structure. 
J. E. Davis exhibited a beautiful specimen of the ‘glass-rope sponge ’ (Eulectella) 
under a bell-glass, and also its network of silicious spicules under the microscope. 
He also showed a fine slide of the interesting diatoms and polycistina dredged from 
the ocean’s bed at a depth of 1,750 fathoms. 
Dr. S. W. Dennis exhibited slides of the optic nerve under amplifications of 30 and 
750 diameters respectively, from which a good general understanding of its structure 
could be obtained. He also showed a very fine injected section of cat’s jaw with teeth 
im situ. 
A fine section through the entire human eye was shown under a lower power by Dr. 
Henry Ferrer, who also exhibited excellent preparations of the human retina, and of 
the embryoniceyeof the calf. Theelegant Zeiss stand and apochromatic objectives be- 
longing to this gentleman received much admiring attention from the experts present, 
Dr. Thomas Morffew’s exhibit illustrated very finely the structure of human teeth. 
Longitudinal sections of an incisor, a cuspid and a molar were shown and their char- 
acteristics duly explained. 
Dr. S. M. Mouser, with a very fine array of instruments, exhibited an interesting 
slide of 77ichina spiralis,and also a series of pathogenic micro-organisms grown in his 
biological laboratory, and shown under high-power objectives giving exquisite defi- 
nition. 
The lingual ribbon or tongue of HYafotis, exhibited by W. F. Myers, strikingly illus- 
trated the characteristics of this peculiar organ of the Mollusce. The beautiful iri- 
descent shell of this animal was also shown, both microscopically and in its entirety. 
The resplendent scales of the diamond beetle were shown by Charles C. Riedy un- 
der a microscope ; interesting from its having been in use for halfacentury. He also 
exhibited the well-known test diatom Pleurosigma angulatum under an amplification 
of’ 2,000 diameters. The most attractive objects in his exhibits, however, were the 
beautiful shells of Foraminifera shown with dark-ground illumination obtained 
by the Bausch & Lomb Abbe condenser. 
Sand from Alameda beach formed an attractive object as shown by Dr. Riehl, who 
also exhibited living diatoms in active motion, collected in San Francisco Bay. 
Dr. J. M. Selfridge presented an attractive exhibit, comprising a very fine mount 
showing the villi in duodenum of rabbit, another of the beautiful crystals of cinnabar, 
and last, but by no means least, the circulation of the blood inthe mesentery of the 
frog. 
Dr. J. H. Stallard’s exhibit was the largest in the hall, he having no less than thirteen 
microscopes under his charge. The entire series was devoted to illustrating the struc- 
ture of both normal and diseased human lungs. The slides shown were all masterly 
preparations, and the opinion was universally expressed that the entire exhibit formed 
the finest presentation of the subject ever seen here. 
The subject chosen by the President of the Society, E. J. Wickson, was that of in- 
sect fruit pests. Living individuals of the Cottony Cushion Scale and the San José 
Scale were shown, and also specimens of the egg deposit of the Lecanzum Scale, and 
of the larval form of Chz/ocorus bivulnerts. Colored engravings, showing the appear- 
ance and ravages of some of these little destroyers were also exhibited. Mr. Wick- 
son’s table was the last on the programme, and its inspection brought to a close an 
entertainment which must be pronounced an unqualified success. 
——_ 90 ———_ 
A well attended regular meeting of the Society was held on June 7th. J. A. Sladky, 
_of Berkeley, was proposed for resident membership. 
An ingenious device, called the ‘Quimby Mounting Cabinet,’ was received for 
inspection from the Society’s indefatigable corresponding member, E. H. Griffith. Its 
purpose is to facilitate the illumination of objects by transmitted light, during the pro- 
cess of mounting. 
Dr. Selfridge brought a sample of the Oakland water supply, which upon exami- 
