PROCEEDINGS OF SOCIETIES. 219 
tion considered as refuse consisting almost entirely of those flat 
fibres, the absence of secondary deposits being an indication of 
careless culture, or, what is much the same thing, of a poor soil. 
Mr. J. G. Dale in a note to the paper on carmine injection 
stated that, as a blue injection, that of Turnbull’s leaves nothin 
to be desired. He could not find the formula for it published, 
and therefore appended a copy, as follows :— 
10 grains sulphate of iron, 
2 oz. water; 
Dissolve cold: then take— 
32 grains ferrocyanide of potassium, 
2 oz. water ; 
Dissolve cold: mix the two together and shake well for some time, 
then add— 
1 oz. glycerine, 
Ij drachm pyroacetic spirit, 
] oz. alcohol. 
The following is the Report referred to at the above Meeting. 
Revenve DepargrMeEnt. 
PROCEEDINGS OF THE Mapras GoverNMENT. 
Read the following letter :— 
From Captain J. Mironent, Officer in charge of the Govern- 
ment Central Museum, to J. W. Brerxs, Esq., Private 
Secretary to His Excellency the Governor, dated Madras, 
21st April, 1862. 
My peak Sir, 
1. On the 4th instant I had the honour to acknowledge the 
receipt of certain samples of cotton that were forwarded with your 
letter of the 3rd April, 1862. 
2. The examination of these samples has occupied all the time 
I could command since that date, and it is now my duty to report 
the result. I fear His Excellency Sir W. Denison will consider 
it a very inadequate return for the time devoted to it. It cer- 
tainly appears so to me. 
3. I have considered it advisable to send im full all the mea- 
surements that I have made of the diameter of the fibre, because 
it seems to me that a mere average is calculated to give a very 
erroneous idea of cotton as it really is. With the whole of the 
measurements before him His Excellency will be able to see the 
ta on which the averages are founded. 
4. The measurements were made with a cobweb micrometer, 
the divisions of which (with the object glass used) have a value 
of +35!s3y of an inch; this quantity, 133,833, therefore, is the 
common denominator of fractions, of which the micrometer read- 
