PROCEEDINGS OF THE SOCIETY. 
495 
On turning over a few pages lie found in the same journal an announce- 
ment that a prize had been awarded to Master J. E. Millais for a sepia 
drawing, so that at the time when Mr. Perigal was writing papers 
like that, the late President of the Royal Academy was a boy ; yet 
Mr. Perigal had survived him. This forcibly brings to one’s mind 
what 98 means. Mr. Perigal did a great deal of work with the lathe, 
especially with elliptic and eccentric chucks. A microphotograph of 
him, and also an ordinary photograph, were on the table that evening. 
In addition to the presents already mentioned, he would call the 
attention of the Fellows to an excellent lithographic portrait of Pro- 
fessor John Quekett, which had been presented to the Society by Mr. 
Aldous. These portraits were the work of Mr. Aldous’ father, and some 
of these having been lately found, the one before them had been very 
kindly given to the Society, for which he was sure their hearty thanks 
would be returned. 
Mr. J. J. Yezey said he should like to be permitted to supplement 
the remarks made by the President respecting Mr. Perigal. He thought 
it would interest the Fellows to be reminded that Mr. Perigal joined 
the Society in 1852 ; and though microscopy had not been so great a 
hobby with him as astronomy and geometry, yet he always took the 
keenest interest in the proceedings of the Society, as indeed he did in 
all the numerous scientific societies to which he belonged. Mr. Yezey 
had had the pleasure of paying Mr. Perigal a weekly visit for many 
years past, and he could testify to the eagerness with which he wished 
to be informed of all that was going on in the scientific world, especially 
since the time when he had been obliged to relinquish his attendance 
at the meetings. Mr. Yezey felt sure Fellows would greatly regret the 
removal of a notable name from their roll of membership. Mr. Perigal 
died on the 6th June, and Mr. Vezey had seen him so lately as the 
3rd June. 
Mr. Swift, being called upon by the President, said that he had 
brought to the meeting a camera lucida, and also a new monochromatic 
screen for exhibition. These were both made by Mr. F. E. Ives ; and as 
that gentleman was in the room he would ask him to describe them. 
Mr. Ives said that the camera lucida did not present any great 
novelty in principle. He had merely taken one which he found in 
Mr. Swift’s show case, and had slightly modified it by depositing on one 
of the inside faces of the compound prism a very thin specular film of 
silver through which it was possible to see the pencil without having to 
centre the eye, as was formerly the case where the film was thick and 
opaque with a small hole left to look through, as in the Abbe camera 
lucida. The other thing was the result of his attempts to make a mono- 
chromatic green screen by means of dyed films between two plates of 
glass, which he thought would be found to possess some advantages over 
the liquid screens in use. The one now shown would cut off all beyond 
the F line on the blue side (including the ultra-violet), and also all red 
and yellow. Nothing whatever but green light was transmitted. 
Mr. C. Beck thought it was a fact that Zeiss had made a camera 
lucida on this principle, which had a very thin silvering between two 
