The Preservation of Structural Timber

Front Cover
McGraw-Hill book Company, Incorporated, 1916 - Structural timber - 361 pages
 

What people are saying - Write a review

We haven't found any reviews in the usual places.

Other editions - View all

Common terms and phrases

Popular passages

Page 263 - The thermometer should be inserted in the retort with the lower end of the bulb one-half inch from the surface of the oil, and the condensing tube attached to the retort by a tight cork joint. The...
Page 86 - When two hundred (200) grams of the oil are distilled in accordance with the requirements of the specifications for the analysis of...
Page 83 - ... tar, oil or residue obtained from petroleum or any other source ; it shall be completely liquid at thirtyeight (38) degrees centigrade and shall be free from suspended matter; the specific gravity of the oil at thirty-eight (38) degrees centigrade...
Page 263 - Reports shall be made on the following fractions : 0 to 170 degrees Centigrade. 170 to 200 degrees Centigrade. 200 to 210 degrees Centigrade. 210 to 235 degrees Centigrade. 235 to 270 degrees Centigrade. 270 to 315 degrees Centigrade. 315 to 355 degrees Centigrade.
Page 16 - ... moisture and of atmospheric air; that its action was provoked by oxygen, and that its method of action was by a communication of motion from the atoms of the infecting ferment to the atoms of the body infected. He denied that fermentation, putrefaction and decomposition were caused by fungi, animalcules, parasites or infusoria, although these organisms might sometimes be present during the processes. But he also stated that the phenomena of decomposition might be suspended by extreme heat or...
Page 269 - ... slightly and placed in a separatory funnel. The mixture is vigorously shaken, allowed to stand until the oil and soda solutions separate and the soda solution containing most of the tar acids drawn off. A second and third extraction is then made in the same manner, using thirty (30) and twenty (20) cubic centimeters of the soda solution, respectively. The three alkaline extracts are united in a two hundred cubic centimeter (200 cc) graduated cylinder and acidified with dilute sulphuric acid.
Page 18 - ... in the woods on skidways or in mill yards for a month or more after they have been cut from the living trees. Under such conditions there is often a reduction in value of from 5 to 30 per cent or more, due to wormhole and pinhole defects caused by roundheaded and flatheaded wood-borers and timber beetles. Frequently the insects continue the work in the unseasoned and even dry lumber cut from logs which had been previously infested. They also continue to work in mine props after they have been...
Page 264 - For the determination of the low-boiling tar acids, the fractions should be placed in a separating funnel, to which should be added about 30 cc. of the 15 per cent. hot sodium hydroxide solution, vigorously shaken, and allowed to stand until the dissolved phenols separate out and may be drawn off, after which repeat with successive sodium hydroxide solutions 20 cc.
Page 262 - For taking samples during the process of treatment, it is desirable to take a sample of oil from the storage tank about one foot from the bottom of the tank before the cylinder is filled, and, where possible, a sample directly from the cylinder during the process of treatment. For this purpose a thermometer well, as shown in attached figure, is recommended.
Page 84 - Not more than 3 per cent of the oil shall be insoluble by hot continuous extraction with benzol and chloroform. 3. On distillation, which shall be made exactly as described in Bulletin No. 65 of the American Railway Engineering and Maintenance of Way...

Bibliographic information