. Bulletin - Massachusetts Agricultural Experiment Station. Agriculture -- Massachusetts. 39 vent leakage and injury to trees, and some of our more progressive gas manufacturers spare no expense or skill in constructing and maintaining their lines. In laying the larger pipes, which are more difficult to keep calked securely, they are providing their patrons with better facilities ; nevertheless, they run a greater risk from leakage. Numerous connections are found in gas mains from which can be detected only slight leakage, perhaps only a few cubic feel a day ; whereas there are others from whi
. Bulletin - Massachusetts Agricultural Experiment Station. Agriculture -- Massachusetts. 39 vent leakage and injury to trees, and some of our more progressive gas manufacturers spare no expense or skill in constructing and maintaining their lines. In laying the larger pipes, which are more difficult to keep calked securely, they are providing their patrons with better facilities ; nevertheless, they run a greater risk from leakage. Numerous connections are found in gas mains from which can be detected only slight leakage, perhaps only a few cubic feel a day ; whereas there are others from which the leakage is extensive. The presence of small leaks, if not attended to, will injure trees in the course of time, since the soil becomes charsed with gas. Fig. 19. Large elms killed by escaping illuminating gas, one and one-half years after leakage occurred. From "Park and ; to a greater or less extent in a few years. In the eastern states the three principal kinds of gas used are water, coal and oil gas, and so far as the effects of these various gases on trees are concerned there is apparently little or no differ- ence, since they all contain similar elements which are poisonous to trees. Two degrees of injury may readily be distinguished as resulting from gas poisoning ; first, incipient cases, and second, pronounced cases. In the first series we have those already alluded to as result- ing from small leaks, the soil in such cases not becoming saturated. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Massachusetts Agricultural Experiment Station. Amherst, : Massachusetts Agricultural Experiment Station, 1907-1974
Size: 2420px × 1032px
Photo credit: © Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthormassachusettsagricult, bookcentury1900, bookdecade1900
