48 REPORT—1863. 
Ovo! . C7H® C®H"05 
Meconin. Benzylene. Mannitan. 
C°—2205 C7H®O C®HuUO8 
Hydrate of meconin (hypothetical). Benzylic alcohol. Mannite. 
op see C7H’O C°H205 
Opianic acid. Oil of bitter almonds. Glucose. 
CM F908 C7HS02 C®HYo7 
Hemipinic aeid. Benzoic acid. Mannitic acid. 
These comparisons lead to the following rational formule :— 
(C'H'O) | Oi: hypothetical hydrate of meconin 
(OH?)2H2 =hypothetical hy : 
5 : 
(CH? 0? =meconin. 
(CHyH. Hi = opianic acid. 
Coney ere ‘=hemipinic acid. 
Combining the above formula for meconin with that pence arrived at for 
cotarnine, the authors give the following as the rational formula of narcotine :— 
CH’ 
(CUH°0?)iii 
8 419 i 
(C H “ ne 
(CH*)?H 
—believing that by it all the known transformations of narcotine and of its imme- 
diate products of decomposition can be expressed. 
Short Communications on Galvanic Copper, Photolithography, and Photo- 
microscopic Specimens. By M. Abbé Moreno. 
On a Deposit in the Gas-tubes of the Cleveland Blast Furnaces. 
By J. Pattinson. 
A substance, in fine powder, varying in colour from blackish-grey to almost 
white, is deposited in the large tubes used for conveying the waste gases of iron- 
smelting furnaces to the boilers and heating-stoves, where they are economized. 
The deposit at present in question had been found in the tube of a furnace smelt- 
ing a mixture of Upleatham and Rosedale ironstones with Weardale blue lime- 
stone and South Durham cokes. The deposit was of a dark-grey colour, and was 
impalpably fine. Analysis determined its constituents as follows :— 
Protoxide of iron .....-....+++++: 14:22 per cent. 
OxideOl ZINC. cee ceciise se se ee nts 1048 ss, 
Sulphide of zine ........-.++ese05- 13:70)" ',3 
JUNC TO SA8 Grip ONOCIC SDI IO OOGOE S20; 
GUNIO caste lene Sen pee in os 3° 12:32, 
Magnesia. oc cscs crac cess eesaeee 503, 
Chloride of sodium. ......-.++++++5 vA aes 
VASNIMONIN ie vietete eve Sayers loys oe sesh OOP 23, 
AN aise ETE oe yqacsSaatar gece wm aissgema oe ae trace ,, 
Sulphuric acid .......- see eeeeees 318, 
Free sulphur ........-+-seeeeeees OLA 5 
STING 3p eiocitaccticnede ahah states sche ot 2260s, 
Carbonaceous matter...........+5+ 450 ,, 
99°84 
