Note 6 — Chapter I
Reading edition
Some further analyses of grains at Trent Bridge gave the following results:—
WaterCaOCaO on dry skin
Grain from splitting machines76·3 1·144·8
The same after washing 24 hrs.86·00·22 1·57
The same after puering——0·80
Another grain79·7 1·065·20
The same after deliming as completely as possible with HCl——0·45
Skin in natural condition64·0—0·125
M. C. Lamb has found in sheep grains split for skivers the following amounts:—
AshCaOCaO in Ash
Grain from splitting machine9·33·234·8
The same after washing4·1 1·535·1
The same after puering3·10·929·1
The same after bran drench 1·70·5532·4
The figures are all percentages calculated on the dry weight of the skin.
Munro Payne (Tanners’ Year Book, 1905, p. 75) gives the following amounts of lime as Ca(OH)2 in limed hides, calculated on dry weight at 212° F.:—
Direct from limesmax. 3·859 per cent.
" "min. 2·836 "
Limed for buff4·621 "
Limed for tanning3·7659 "
Ditto after bating0·689 "
Calf limed2·601 "
Calf bated0·1215 "
Goat limed5·613 "
Goat bated 1·268 "