โ Scribed by Johnston, H. Wyatt
No coin nor oath required. For personal study only.
of tlicsc t.lircc crops. Ereii slioiild it shift OCCIIC i t would iiot nltcr to m y cstcnt tlic total volume of ccrciil protluction. This is cviclciit froiii tlic fnct inclicntctl 'hIIL15 I Arreugt rtirtl prodicclioir o/ cerenl c r o p iri Cnnntkt Cerisns 01 I!i:H) Acrciigc I'rotluctioii Acrcs 5:,
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Poly(carboxylic acid)s have been used as crosslinking agents for wood pulp cellulose to increase the wet strength of paper. In this research, we evaluated the effects of two multifunctional carboxylic acids, i.e., 1,2,3,4-butanetetracarboxylic acid (BTCA) and poly(maleic acid) (PMA), on the wet stre
## 97 scratch hardness, loss of weight in a I per cent. acid solution, the amount of carbide, and microscopically. It is concluded that hardened steel always tends to change into a-iron and free cementite. Although this change proceeds imperceptibly at ordinary temperatures, it takes only a few se