PROCEEDINGS OF SOCIETIES. 41 



on the ' Ehomboides ' with an eye-piece that gave a magnification of 

 upwards of 1200 x • One of Dr. Carpenter's spiral thread-cells 

 (Ammodiscus Lindnhli) was shown with most satisfactory results." 



Mr. Jabez Hogg : An old 1 of Andrew Eoss, and the new " Eeflex 

 .Illuminator " of Wenham. P. angulatum and Bhomboides were brought 

 out in lines and dots, in a perfectly clear and crisp manner, and 

 without difficulty. He also showed several objectives by F. W. 

 Schieck, of Berlin. As these only came into his possession an hour 

 before the time of meeting, it is almost impossible to speak of their 

 performance. He found that a x^th immersion tested on "Ehorn- 

 boides" and on Dr. Carpenter's test "thread-cells." gave fine defi- 

 nition, with good penetration. 



Mr. Browning: A set of Nobert's lines. A section of opal in 

 matrix, from South America. 



Mr. Loy: Preparation, showing anatomy of leech, and illustra- 

 tions of his method of dissecting. 



Mr. F. H. Ward : Eectangular crystals of uric acid. 



Mr. S. J. M'Intire : Podura, Templetonia nitida alive, hatched and 

 bred in captivity. 



Messrs. Eoss : Their new patent \ inch and y L- object-glasses. 



Dr. Eoyston-Pigott : A new aerial micrometer for the stage, 

 measuring to the 100,000th of an inch ; and a new lens micrometer 

 for estimating power to supersede the Canada-balsam micrometer, 

 j Mr. Thomas Curteis : A chigoe in situ. 



Mr. Charles Baker : A slide, with 400 butterfly scales and diatoms, 

 arranged as a vase of flowers. 



Dr. W. J. Gray : Parasitic growths in Closterium. 



Mr. Charles Stewart: Vertical section of the compound eye of 

 blow-fly, &c. 



Dr. Millar : Stephenson's new binocular as a dissecting microscope. 



Mr. J. W. Stephenson : Diatoms mounted in bisulphide of carbon, 

 with a Eoss' ^th, on his new binocular microscope ; and the Test 

 Podura scale. 



Mr. H. J. Slack : Sepal of gum cistus, with polarized light. A 

 fractured valve of Coscinodiscus ocidus Iridis, showing the reality o 

 the hexagonal markings. 



Mr. Thomas C. White : Hippuric acid crystals recrystallized over 

 fuming sulphur. 



Mr. John Ingpen: Photograph of Fraiinhofer's metzotint of the 

 solar spectrum. 



Mr. James How : Dr. Guy's " Illuminator hand microscope." 



Mr. J. C. Sigsworth : Transverse section of Acrocladia mammillata, 

 dry, with combined reflected and transmitted oblique (white cloud) 

 illumination, by means of one light. 



Messrs. Powell and Lealand : Scale of Podura, with r \,-th object- 

 glass, 2500 diameters ; and Pleurosigma angulatum, with -g^h object- 

 glass, 4000 diameters. 



Dr. Eutherford : An injecting apparatus. The pressure obtained 

 from a column of water. This appears to be the cheapest and best 

 form of injecting apparatus. 



Mr. H. F. Hailes : Some new forms of Foraminifera. 



