361 



ing au enlarged image by these cameras without altering the object-glass, so 

 that large diagrams could be drawn direct from the object. He next 

 described the various kinds of reflectors attached to the eye-piece, showing 

 the objection to the use of them as reversing the image, and the means to 

 be employed to obviate this defect. The next step towards the artistic 

 method was the use of a cover-glass, ruled in squares and placed on the 

 diaphragm in the eye-piece, the drawing being made through the medium 

 of the eye on sectional paper. Different sized rulings on this paper were 

 exhibited, with drawings, which showed that exactly proportionate drawings 

 could thus be made from the same object and object-glass. The methods of 

 transferring drawings into a note-book, or for other purposes, were shown 

 and explained. The last method described was by viewing the object direct, 

 and drawing on paper placed close to, and coincident with the stage of the 

 microscope. The necessity of a knowledge of the form of the object, if 

 solid, and of making snch drawing according to the rules of perspective, 

 were commented upon, and explained by diagrams on the black board. Mr. 

 Hardy also spoke in favour of making drawings on black paper in Chinese 

 white with a fine sable brush, and showed some drawings effected in 

 this manner, enlarging upon the expression of character in a drawing done 

 in this way in contra-distinction to a mere copy or outline. 



After the demonstration some highly-finished coloured specimen drawings, 

 kindly lent for the purpose, were exhibited, and various explanations were 

 given. 



The following objects were exhibited in the Library : — 



Eggs of Prawn Mr. F. W. Andrew. 



Section of Serpentine from the Lizard, Corn-") , » A T P 1 tt 



wall ... "• ) 



Section, Ovary of Saxsifraga crassifolia ... Mr. H. E. Freeman. 

 Protococcus, Amoeboid form ... ... ... Mr. W. Goodwin. 



Casts of Foraminifera, &c, from Calcareous ) 



D , , , n -r, , c Mr. H. F. Hailes. 



feandstone from .Bombay ... ... ) 



Diatoms, Triceratium parallelum, &c. ... ... Mr. H. Mox'land. 



Spider, Clubiona, polarized ... ... ... Mr. T. S. Morten. 



Bacillum of Tuberculosis, with half-inch ob-") ™ -p -^ „, 



ject-glass ... ... ... ... ) 



Sponge, Farrea Ocea, with the Tube of an") 



Annelid composed of Spicules from Corti- > Mr. B: W. Priest. 



cum abyssi and Clione abyssorum ... J 



Cystolith in Cortex of Ruellia joortallce ... Mr. J. W. Keed. 



Oil Glands in Leaf of Eucalyptus globulus ... „ „ 



Star-fish, Ophiocoma neglecta, showing reO ,, » w chokes 



generation of limbs ... ... ... ) 



Actinogonium sejptenarium, Astrolampra de-~) •««■ p c+ r f 



cora, &c, mounted in gum sty rax ... ) 

 Fragillaria cajpucina ... ... ... ... Mr. A. Wildy. 



Attendance — Members, 108 ; Visitors, 9. 



