848 



others. Fuchsias and Eccremocarpus are sprouting ; and the Clema- 

 tis in many instances has grown more than a foot in length. Potatoes 

 are in many places a foot in height, and Tropaeolum continues grow- 

 ing. In a pond about a mile from Ryde, that rare, and beautiful, and 

 deliciously scented aquatic, Aponogeton distachyon, is at present 

 blooming to perfection. 



" It is, I think, usual in this district, for many of the above to 

 sprout, and occasionally to bloom, in winter ; but I never before 

 knew vegetation quite so active as it is at this season." 



Microscopical Society of London, 



October 27, 1852. — George Busk, Esq., in the chair. 



A paper by Joseph Delves, Esq., ' On' the Application of Photo- 

 graphy to the Representation of Microscopic Objects,' was read. 



After some preliminary observations, the author stated that the only 

 arrangment necessary for the purposes of photography is the addition 

 to the microscope of a dark chamber, similar to that of the camera 

 obscura, having at one end an aperture for the insertion of the eye- 

 piece, and at the other a groove for carrying the ground glass plate. 

 This dark chamber should not exceed eighteen inches in length, as, 

 if longer, the pencil of light transmitted by the object-glass is diffused 

 over too large a surface ; and a faint and unsatisfactory picture is the 

 result. Another advantage is, that pictures at this distance are in 

 size very nearly equal to the object as seen in the microscope. The 

 time of producing the picture varies from five to fifteen seconds. The 

 author also made some remarks upon the mode of manipulating, and 

 concluded by calling attention to some very beautiful specimens that 

 were afterwards presented to the Society. 



Errata in a previous Number. 



Mr. Maw wished to have the following errors corrected, which 

 occur in his paper at page 785 : — Page 785, line 8 from bottom, for 

 *'at" read "of;" page 786, line 4 from bottom, for "areas" read 

 " axis ;" page 787, line 6 from top, for " entering " read " resting ;" 

 page 792, line 20 from top, for " Forthelsloch " read " Frithelstock j" 

 page 794, line 13 from top, for " Witham " read " Northam ;" page 

 794, line 14 from bottom, for " Barnstaple " read " Bideford." 



