48 ANIMAL PROTEINS 



motion in stronger infusions. It is of course liable to result 

 in an under-tannage of the interior of the fibre. After the 

 goods have been " struck through " in the ordinary way, 

 however, drumming in extract is increasingly used as a 

 substitute for much labour in handling, and also to save the 

 time spent in the early layers. 



REFERENCES. 



Procter, " Principles of Leather Manufacture," pp. 220-350. 

 Bennett, "Manufacture of Leather," pp. 113-179. 

 Bennett, "Celavinia and Babla," L.T.R., 1914, 122. 

 Dumesny and Noyer, "Manufacture of Tanning Extracts." 



Theory : 



Meunier and Seyewetz, Collegium, 1908, 195. 



Stiasny, Collegium, 1908, 117-159, 289, 294, 337. 



Procter and Wilson, Collegium (London), 1917, 3. 



Wilson, Collegium (London), 1917, 97, 100, 105. 



Moeller, Collegium (London), 1917, 13, 38, 46, 103 ; and J.S.L.T.C., 1917, 

 22, 56, 92. 



Bennett, J.S.L.T.C., 1917, 130-133, 169-182; 1918, 40; 1920,75-86; 

 S.L.R., 1916, March. 



