o-t The MiciiOSCOPE, 



At the meeting, November 10th, Mr. J. Z. Davis showed some 

 fine examples of lacunae in quartz crystals containing fluid and bub- 

 bles. Dr. J. H. Stallard spoke on the enormous development of the 

 bile ducts in jaundice, and illustrated his remarks with slides. Mr. 

 Wickson referred to some insects which he had found in large num- 

 bers on some laurel trees. It is probable that it is a genus of Psocus. 

 but this has not yet been determined, and the insects are now 

 under investigation. 



November 24th: Mr. Wickson continued his remarks on the 

 insects of the genus Psocus. Specimens of an Australian Polyzoan, 

 Bicellaria ciliata, and an Alga, Trichodesmium, were shown by Mr. 

 Howard. Prof. Hanks exhibited some remarkably fine examples of 

 insects preserved in amber and in fossil copal. 



Dr. Montgomery exhibited a number of interesting slides, illus- 

 trative of the minute structure of the eye. 



A " Holman Life Slide," containing an unusually rich collection 

 of pond organisms, was shown by Mr. Payzant. 



December 8th: Vice-President Wickson occupied the chair, 

 and explained that the meeting had been called for the special pm'- 

 pose of examining the new Zeiss Photomicrographic camera and 

 stand. Dr. Ferrer then briefly described the salient points of the 

 instrument. 



After those present had duly inspected the details of the exqui- 

 sitely finished instrument, a demonstration of its practical working 

 was given by taking a photograph of a stained section of the eye in 

 the embryo of the calf. The plate was given an exposure of eight 

 minutes and, notwithstanding the unfavorable conditions caused by 

 the ci'owded room, the resulting negative was, upon development^ 

 found to be excellent. A number of prints from negatives of other 

 subjects were handed around and were examined with much interest. 

 Several histological preparations were also shown under the micro- 

 scope, with a novel monochromatic illumination. 



December 22: Prof. Rnnyon, who was present as a visitor, 

 exhibited a number of photo- micrographs made by him with the 

 Walmsley apparatus, and only a common oil lamp as a soiu'ce of 

 illumination. 



William Norris stated that several series of interesting slides 

 had been received by him, which he would turn over to the Society. 

 The first set was composed of diatoms collected and mounted in 

 Australia, by Dr. Thomas Porter, and comprised many rare and 

 beautiful forms. The second lot was from Wm. H. Pratt, Taunton, 

 Mass., and the third from Gerald Stuart, F. R. M. S., London. The 

 latter set consisted of diatoms from New Zealand, and the East 



