| FROM MEMPHIS, TENN. | ||
|---|---|---|
| Grains per Gallon. | ||
| Silica | .8292 | |
| Oxides of iron and aluminium | .4789 | |
| Carbonate of lime | 1.8337 | |
| Carbonate of magnesia | .9956 | |
| Carbonate of soda | 1.9792 | |
| Total solids | 6.1166 | |
| FROM PEKIN, ILL. | ||
|---|---|---|
| Grains per Gallon. | ||
| Silica | 1.0628 | |
| Oxides of iron and aluminium | Trace | |
| Carbonate of lime | 10.0915 | |
| Carbonate of magnesia | 5.8224 | |
| Chloride of soda | Trace | |
| Sulphate of soda | 1.2456 | |
| Total solids | 18.6471 | |
| FROM TIFFIN, OHIO. | ||
|---|---|---|
| Grains per Gallon. | ||
| Silica | .5256 | |
| Oxides of iron and aluminium | .2336 | |
| Carbonate of lime | 12.6144 | |
| Carbonate of magnesia | 10.2652 | |
| Carbonate of soda | 2.4137 | |
| Sulphate of soda | 6.8296 | |
| Chloride of sodium | 1.0484 | |
| Total solids | 33.9395 | |
CORROSION AND INCRUSTATION OF STEAM BOILERS.
No more perplexing question presents itself to the engineer and steam user than the one to be inferred from the above heading. Enormous losses of money, danger to life and property and the loss of position and the reputation of the engineer are involved in it. How to avoid these actual evils is of the first importance in steam economy. The subject at first sight seems to the average student a difficult one to master, but like all other matters pertaining to mechanics, investigation that is backed with reason, will show that much that appears obscure is really very plain indeed; this is because nature, even down to the sediment remaining in a boiler after the conversion of water into steam, operates in its formation with infinite exactness and along well known lines.
Question.—What is corrosion?
Answer.— Corrosion is simply rusting or the wasting away of the surfaces of metals, for particulars of which see page [126.]
Question.—What is incrustation?