-----------+---------+---------+---------+-------------------+------- Temperature| Tanning | Soluble |Per cent.| Colour of ¹⁄₂ per | Per of | Matters | Non- |of Tannin| cent. Solution in | cent. Extraction.| absorbed| Tanning | on | ¹⁄₂-inch Cell. | of | by Hide.| Matters.| Maximum +----+-------+------+ Colour | | | Yield. |Red.|Yellow.|Total.| on | | | | | | |Maximum | | | | | | | Yield. -----------+---------+---------+---------+----+-------+------+------- °C. |per cent.|per cent.| |deg.| deg. | | 15 | 46·8 | 21·8 | 78·0 | 2·5| 7·8 | 10·3 | 57·2 15-30 | 48·8 | 21·0 | 81·3 | 1·7| 8·0 | 9·7 | 54·9 30-40 | 50·2 | 22·0 | 83·7 | 1·7| 8·6 | 10·3 | 57·2 40-50 | 51·9 | 23·0 | 86·5 | 1·7| 8·8 | 10·5 | 58·3 50-60 | 51·1 | 20·3 | 91·9 | 1·7| 8·9 | 10·6 | 58·8 60-70 | 55·6 | 20·3 | 92·7 | 1·9| 9·4 | 11·3 | 62·7 70-80 | 55·7 | 20·3 | 92·8 | 2·2| 10·1 | 12·3 | 68·3 80-90 | 55·8 | 21·2 | 93·1 | 2·3| 10·6 | 12·9 | 71·6 90-100 | 56·1 | 22·0 | 93·3 | 2·8| 11·6 | 14·4 | 80·0 Boiled | | | | | | | ¹⁄₂ hour | 60·0 | 20·0 | 100·0 | 3·2| 14·8 | 18·0 | 100·0 -----------+---------+---------+---------+----+-------+------+------- BLOCK GAMBIER. _Effect of Different Temperatures._