74 
The President's Address. 
of the season when oranges are plentiful to pursue this inves- 
tigation^ I would recommend attention to the suggestion of 
the Rev. Mr. Eeade^ viz._, immersion of the shield for a short 
time in hot liquor potassse^ by which the vegetable portion is 
dissolved^ while the animal part remains^ and the insect in all 
its stages of development is distinctly revealed. The author 
concludes with this remark : — " I have invariably used Mr. 
Wenham^s binocular arrangement with the microscope^ and 
I can only say that for this class of investigations the results 
are perfectly marvellous." 
These are some of the first fruits of that invention which 
Mr. Wenham has so freely given to the worlds without restric- 
tion or reservation. The Microscopical Society has good 
reason to be proud of such a member^ distinguished alike for 
his scientific attainments and mechanical skilly as well as the 
modesty and liberality which prove him to be a true disciple 
of science. 
3. " On a Coccus upon a Uosebush/^ by Richard Beck. 
(Read November 13th, 1861. ^Tr. Mic. Soc. Lond./ n. s., 
vol. X, p. 16). 
The author notices that the coccus described in the former 
paper is to be met with in our gardens,, and ^' that the 
same species may differ very considerably, more especially on 
the exterior of the shield, according to the climate, its posi- 
tion, or the nature of its food." 
4. On the Viscid Lines in a Spider^s Web," by Richard 
Beck. (Read November 13th, 1861. ' Tr. Mic. Soc. Lond.,' 
n. s., vol. X, p. 17). 
The author describes the process of the formation of the 
viscid globules on the concentric lines of the web, he having 
witnessed the operation. The whole process he considers an 
instance of molecular attraction," a subject so profoundly 
studied and lucidly explained by Mr. Rainey. 
5. '^'^On some points in the Structure of the Hairs of In- 
sects in diff*erent degrees of development," by Tuff'en West. 
(Read November 13th, 1861). 
D. Phytology. 
We have had seven papers on the Diatomacese, six of which 
are by R. K. Greville, LL.D., F.R.S.E., &c. 
1. " Descriptions of New and Rare Diatoms." 1st series. 
(Read March 12th, 1861. 'Tr. Mic. Soc. Lond.,' n. s., vol. 
ix, p. 39.) 
2. Ditto, 2nd series. (Read June 12th, 1861. ' Tr. Mic. 
^oc. Lond.,' n. s., vol. ix, p. 67.) 
3. Ditto, 3rd series. (Read June 12th, 1861. ' Tr. Mic. 
Soc. Lond.,' n. s., vol. ix, p. 73.) 
