IS Thb Microscope. 



at any one time on this coast), embracing examples of the best work 

 of such renowned opticians as Zentmayer, Ross, Beck, Zeiss, Crouch, 

 Bausch & Lomb, Grundlach, Nachet, Bulloch, Baher and others. 

 Among the objectives used, in addition to the productions of the 

 makers already named, were choice specimens of the skill of Tolles, 

 Spencer, Powell & Lealand, Hai-tnack and Swift. Nearly all the 

 lamps with the instruments were screened with Japanese shades, 

 which not only produced a pretty eiJect, but added to the comfort 

 of visitors and exhibitors by protecting their eyes fi'om a glare of 

 light. The list of guests comprised many of the prominent names 

 in social and scientific circles of this vicinity, and the occasion was 

 evidently a thoroughly enjoyable one to all concerned. 



The first exhibitor on the list was Dr. C. P. Bates, who showed 

 an interesting slide of living infusoria, chiefly Monadina. The 

 strange forms and erratic gyrations of these lowly organisms always 

 prove attractive to observers. 



At the next table the circulation of the blood was beautifully 

 shown by Dr. J. M. Selfridge, in the mesentery of the living frog. 

 The sight of the oval corpuscles coursing swiftly through the blood 

 vessels, never fails to excite wonder and delight. 



Crystals of gold and silver were displayed by George C. Hickox 

 tinder his large Beck binocular, and his exhibit was an exceedingly 

 attractive one. Some large fern-like ciystals of gold were particu- 

 larly admired. 



E. J. Wickson showed a fine series of living scale insects under 

 four excellent instruments. As the ravages of insect pests in this 

 State are at present attracting much attention, this exhibit was re- 

 ceived with peculiar interest. The red orange-scale {Aspidiotus au- 

 rantice) was a most striking object. 



A. H. Brechenfeld exhibited the head of a jumping spider, 

 whose six gleaming eyes gave it a peculiarly ferocious appearance; 

 the head of a male wasp, showing the beautiful structure of the 

 sucking lingua or tongue, and a slide of young oysters (rolling in 

 fluid), to which polarized light imparted gorgeous hues. 



The exhibit of Chas. W. Banks was, as usual, a large and varied 

 one. An ingenious apparatus for showing the combustion of various 

 metals in the electric arc received many admiring comments. Under 

 another microscope were shown the brilliant efPects produced by the 

 passage of the electric spark through a film of loose carbon. It was 

 one of the most effective displays in the line. A number of other 

 attractive objects were shown by Mr. Banks, notably a fine slide of a 



