ZOOLOGY AND BOTANY, MICROSCOPY, ETC. 



523 



is described as defective, but later the author had recourse to a special 

 apparatus which allowed the use of sun- and arc-light, so that higher 

 powers could be employed. 



DS-J.R>E?.HWV 



Fig. 90. 



Practical Photomicrography.* — J. Jullien describes how an 

 operator, moderately skilful with his hands, can make a framework 

 which will give very satisfactory results at an outlay of about a couple of 

 shillings. The bottom of a kind of box on suitable trestles is pierced for 

 the insertion of the microscope tube, and the top is formed of a ground- 

 glass plate. The apparatus is thus a camera of peculiar form. The light 

 source is an incandescent gas lamp, and the author gives full practical 

 details. 



Milne, J. R. — A Special Form of Photographic Camera for Recording the Readings 

 of the Scales of Scientific Instruments. 



Proc. Roy. Soc. Edinburgh, xxix. (1908-9) pp. 176-81 (4 figs.). 



(5) Microscopical Optics and Manipulation. 



Barnard, T, E. — Ultra-microscopic Vision. 



[Gives a clear account of the present state of this subject.] 



Nature, lxxix. (1909) pp. 489-90 (2 figs.). 



(6);Miscellaneous. 



Quekett Microscopical Club. — The 458th Ordinary Meeting was 

 held on June 4, Dr. E. J. Spitta, F.R.A.S. F.R.M.S., Vice-President, 

 in the Chair. A specimen of NavicuJa Jyra exhibiting abnormal 

 markings, one of several found in the same gathering, sent by Mr. 



* Bull. Soc. Zool. de Geneve, 1908, pp. 101-4 (1 fig.). 



