Isin !?la$!

FISHES.

1385

v^5*S tilUS

S ' the fish are placed on rafts and gutted. The roes are removed to makeV 252

b. Tijg ,. Abdominal Viscera of Acipenser Ruthenus .

c - The i, l - The swimming bladder.

d. The %■ I i adder - m. The ductus pneumaticus.

*• The a.j uct > opening into n. and o. The intestines.

/■ The tn-° eilum ' p The anus.

3. The st ^^"tnculus. - q. The ovaries.

h. The n °i mac r. The oviduct and ureters, forming*• The l0rus- s. The common tube, which terminates

the duct of which ter- at t.

h . The s ) 6S c ose to the pylorus. a. The free opening of the oviduct in the

Cavi ap ** 6en ‘ abdominal cavity.

bVhe air w i||' e .^’ r ;hags to yield isinglass. The latter are slit open, washed, and placeddry? dried u n f in 1 ? ner lining upwards. The latter is then scraped off, and the sacUy i ,s r '>llerl ° deu constitutes leaf isinglass. Sometimes, however, before it is quitelittl ** n ds are ct' ‘ ^ en . 1 Bke a horse-shoe or a lyre, and is then termed staple , (of whichh.^uare lslln g u ished, the Iona and the short). Sometimes it is folded up into'C ka ? es ’ h )rtui ng book isinglass.

r'd up IjL-, aas , ls prepared from the intestines of the cod. Itis imported from America0 f jMh36j ar,l >bon.

8| Uglass witlf V^bted to a dealer (now deceased) for the following list of the kindsr. 1 their prices at that time, known in the London market:—

*ORto.

Designation. Price per lb.

s. d.

8tapi e ( staple (finest) from Ural. 13 6

. J "hurt staple (Patriarch), from Astrachan , very scarce and dear.

J Short staple (finest), ditto. 14 6

v Samovey short staple. 6 0

Lt a r ( Astrachan leaf (finest). 13 6

J .JBelugaleaf. 11 6

i Brazilian leaf, from Para. 5 0

^°ofc \8amovey leaf (finest), from the Caspian. 4 6

.J ^amovey book (finest), ditto. 4 6

\Uralbook .. 12 0

b. .. Siberian purse . 9 0

uP* .... v Hudson’s Bay purse . 7 0

1 bon ^ .Bipe isinglass, from Maranham, Brazils. 4 6

p. .. isinglass, New York . 4 0

Ic * f d.... ^ Bicked Astrachan leaf. from lls. to 14 6

"" J D^ked Brazilian leaf. 6 6

j. * Pickings (the brown ends). 8 6

cutlass Was f

? lea m.pow° rme v ^ Packed into shreds by women and children. It is now usually‘V ( ) 0 lhe finest ft When redu ? ed ‘° small threads, it is scarcely possible to distin-*kn c 111 f r °tn anv° m S , ome °f l * Je inferior kinds. The best criteria are its whiteness, its^ih C f^ e d Paten }*** J ! ea ? an . t °dour, and its complete solubility in water. The sub-Ho 0 j‘ e 9 € *atine is frequently employed as a substitute for isinglass.

'" | ilj li ’ lu nd tb e Co e H ua "ty was analyzed by John (Gmelin, Handb. de Chem. ii. 1468),V n % "atey 2 .^ tlS ^ ltueu | s to be gelatine 70 0, osmazome 16‘0, membrane insoluble in®> 4-0 ) and' '' reeac ^ (laetic ?) with salts of potash and soda, and some phosphatent -' s b, as r> v>a ter 7-0. These results, however, can scarcely be accurate ; forer zelius ( Traite de Chim. t. vii. p, 668) observes, does not contain