PROCEEDINGS OF THE SOCIETY. 
285 
The List of Donations (exclusive of exchanges and reprints) 
received since the last meeting was submitted, and the thanks of the 
Society were given to the donors. 
From 
Monograph of the Palaeontograpliical Society. Vol. xlvii. ..j 
Proceedings of the Koyal Institution of Great Britain. > Mr. Frank Crisp. 
Yol. xiv. pt. 1 ) 
Memoirs of the Californian Academy of Sciences. Yol. ii. 
No. 3 The Academy. 
Crombie, J. M„ Monograph of British Lichens. Vol. i. .. { 
A Stereoscopic Photomicrograph of Heliopelta Dr. W. C. Borden 
Prof. Bell called special attention to the volume presented by the 
Trustees of the British Museum as being the first descriptive catalogue 
issued by the Botanical Department. 
On the motion of the President, the special thanks of the Society 
were voted to the Trustees of the Museum and to Mr. Frank Crisp for 
their valuable donations. 
Mr. C. L. Curties exhibited and described a new form of photo- 
graphic camera and apparatus for drawing microscopic objects designed 
by Prof. Edinger, and sent over for exhibition by Herr Leitz, of Wetzlar. 
Mr. Curties said that he had taken some photographs with it, and found 
it to work well ; for drawing, the camera was removed and the image of 
the object was projected distinctly upon a sheet of paper placed upon 
the base-board. 
Dr. W. H. Dallinger said he had not used this apparatus for photo- 
graphy, but he had for drawing, up to about 120 diameters, and found 
that it worked extremely well ; for this purpose he thought it would be 
far more useful than anything of the kind which he had yet met with, 
especially where it was desired to draw large objects rapidly. Mr. Curties 
appeared also to have found it useful for photography — of course, for 
low powers only — and therefore it was likely to prove doubly useful. 
Dr. Dallinger exhibited a new pattern Microscope recently made by 
Mr. Swift, which was, perhaps, not remarkable in any special way, save 
one. He had long striven to get an inexpensive instrument of thoroughly 
good quality suitable for histological work, so that the student need not 
go to Germany to get his Microscope. One of the conditions laid down 
was that it should have a tripod stand, as affording a firmer basis than 
the heavy horse-shoe foot. In practice, however, he had found that most 
of the inexpensive instruments made on this plan would tilt comparatively 
easily at right angles to the sides of the triangle. Mr. Swift had now 
adopted a plan by which in a method which was most ingenious he had 
succeeded in getting over this difficulty. It was obvious that if they 
added a fourth foot, the freedom from lateral tilt would be secured, but 
this, as they also well knew, would be at the risk of destroying the general 
steadiness whenever the instrument was placed upon a surface not perfectly 
even. Mr. Swift had, however, got over this by making a four-footed 
instrument which — paradoxical as it might sound — was still in reality 
