618 PROCEEDINGS OF THE SOCIETY. 



Mr. Conrad Beck read a paper " On some new Cladocera of the 

 English Lakes." 



The President expressed the great interest with which he had 

 listened to the paper, and his appreciation of the perseverance with 

 which Mr. Beck had devoted himself to the subject. 



Mr. Crisp said it might have been supposed that the subject of the 

 paper had long been worked out by English naturalists, but as a 

 matter of fact it did not appear that hitherto it had occurred to any 

 one to undertake such an examination of the 'English Lakes as Mr. 

 Beck had initiated. 



Mr. Stewart and Prof. Bell also referred in complimentary terms 

 to the paper ; and further remarks were made by Mr. Hardy and Mr. 

 J. Beck. 



Dr. F. C. Kiaer's paper " On Microphotography by Lamplight " 

 was read, the subject being illustrated by a number of microphoto- 

 graphs, all taken by lamplight, with Nachet objectives Nos. 0, 1, and 

 5. These demonstrate, in the author's opinion, that with these objec- 

 tives just as good results are to be obtained by lamplight as by sun- 

 light. The lamplight, besides being inexpensive and readily accessible 

 at any time (the time for exposure being easily fixed and with absolute 

 certainty), allows microphotographs to be taken of objects with dark 

 colours. It requires no correction for the chemical focus, nor 

 jiroduces in an objectionable degree phenomena of interference or 

 heat. 



The President said that the photographs appeared to be very 

 excellently done, and it was of great interest to know that so much 

 could be done with such simple methods. 



The paper was also discussed by Mr. Mayall, Dr. Maddox, and 

 Mr. Stewart. 



Dr. Flogel's paper "On Cutting Sections of Diatoms" was ex- 

 plained by Mr. Crisp, and the drawings accompanying the paper 

 exhibited. 



Mr. Beck asked if Dr. Flogel claimed that he had determined the 

 internal structure of the diatoms by means of his sections ? 



Mr. Crisp said that Dr. Flogel claimed that many years ago, in a 

 paper which he published in 1873. His present paper was written in 

 reply to a communication to him from Mr. Mayall, and was intended 

 to supplement the previous one by new proofs, and to refute some of 

 the objections which had been made to the previous one. 



Mr. Curties inquired if there were any specimens of diatoms in 

 sections, or were there only drawings ? 



Mr. J. Mayall, jun., said that mounted specimens, in further illus- 

 tration of the paper, had been forwarded, but had not yet arrived. 

 They would be exhibited at the October meeting. 



Mr. Beck said that the subject was one of surpassing interest to 

 microscopists, and he thought it would be very desirable that the 

 earlier i)aper of the author should be translated and published. 



