123 
made some observations upon the germination of Phragmidia, and the 
nature of the fructification of the genus Thelephora, with regard to 
certain bodies similar to asci, which, he stated, are to be found at an 
early stage of growth. The author concluded with some remarks 
upon the different species of Uredines ; he expressed some doubts as 
to the real difference of the numerous named species of that genus, 
stating that he had himself found Uredo Euphorbie growing upon 
the culms and leaves of Alopecurus agrestis. 
—== 
Saturday, January 28th, 1854.—George Busk, Esq., F.R.S., Pre- 
sident, in the chair. 
Exhibitions. 
Mr. Glaisher exhibited several very beautiful photographic copies 
of the crystals of snow, produced at the Royal Observatory. He 
stated that he had counted upwards of fifty compound forms. 
The President exhibited a series of excellent photographs of 
microscopic objects, principally zoophytes, obtained by means of the 
collodion process from negatives on glass, by gas-light. The average 
lime of exposure was nine or ten minutes. 
Mr. Currey exhibited a very beautifully prepared collection of 
Algz, obtained by Mr. Tuwanowicz, at Hastings; accompanied by a 
communication from the same gentleman, descriptive of his method of 
preserving them, which is as follows :— 
Method of Preserving Alge. 
“ Alge should be gathered on rocks, either very early in the 
morning, or when the sun is considerably below the meridian. If 
gathered amongst the rejectamenta after a storm, absolutely very 
early, for the sun would scorch them, and the finer and more delicate 
ramuli are distorted by heat and matted together. An oil-skin bag, 
or, still better, a bottle with a large neck, is necessary for collecting 
Algz ; using therefore the latter, fill wp part of it with sea-water and 
deposit your discoveries in it. When at home, first cleanse them in 
one or two washes of sea-water, then dislodge all parasites as far 
as possible with small scissors, except those minute Algz which must 
be left parasitically upon another plant. The coarser Algz, as Fuci, 
Halidrys, &c., require to be kept in fresh water for several days to 
deprive them of the salt; but all the minute or delicate ones, such as 
