No coin nor oath required. For personal study only.
Sept., I917.] U.S. BUREAU OF STANDARDS NOTES.
to determine to what extent the customer benefited through periodic maintenance service.
By these observations it is found that a lamp not on regular maintenance is likely to be defective 5~ times as frequently as a lamp which is regularly maintained. Also, it is shown that, on the average, one in three of the lamps on regular mnaintenance was not in good condition, whereas the defects noticed in the lamps not so maintained average more than one for every lamp.
The principal defects in maintenance systems were also investigated, and one satisfactory system of estimating the expenses for maintenance work, together with a set o.f unit costs, is presented, based upon the analysis o.f the operation of ten gas companies. A suggested table of costs for each type of unit is given.
๐ SIMILAR VOLUMES
A 1.'Ew preliminary experiments conducted in the Bureau of Chemistry indicated that if all of the foots are removed from crude peanut oil the keeping quality is very good indeed. If the crude oil remains in contact with the foots the oil deteriorates much more rapidly in most instances.