. Bulletin of the Department of Agriculture. Agriculture. BULLETIN 06, V. S. DEPARTMENT OF AGRICULTUEE. 1 slight changes in consumption or*increase of stores. By means of a double beam it was possible to counterbalance for extra thermometers or other small special apparatus wliich might be added temporarily, \nthout necessitating a correction of the hourly readino-s. The scales were found to be relatively satisfactory, but in times of heavy ^vind extra precaution was necessary in order to overcome the influence of drafts on the scales. In winter this could easily be accompUshed by closing
. Bulletin of the Department of Agriculture. Agriculture. BULLETIN 06, V. S. DEPARTMENT OF AGRICULTUEE. 1 slight changes in consumption or*increase of stores. By means of a double beam it was possible to counterbalance for extra thermometers or other small special apparatus wliich might be added temporarily, \nthout necessitating a correction of the hourly readino-s. The scales were found to be relatively satisfactory, but in times of heavy ^vind extra precaution was necessary in order to overcome the influence of drafts on the scales. In winter this could easily be accompUshed by closing the door of the shed in which the experi- ment was carried on. For outdoor work, however, some difhculty was experienced, as Arlll be explained. The agate-set bearings were also sensitive to jar, which was con- stantly guarded against. THE THERMOMETERS. Seven mercury thermometers were used, of the type known as incubator thermometers, which have a long stem and can be read to fifths of a degree. One instru- ment, how^ever, used to register the temperature of the outside air w^as an ordinary chemical ther- mometer. These instruments were standardized and w^ere graduated to the centigrade scale. ^ THE HIVE AND ITS Fig. L—The hive used iu the experiment on the temperature of the bee colony: A , storage cham- ber for accessories, with door; B, bottom board with entrance; C , collar with feeder; D, brood chamber; E, perforated zinc honey board; F, second story for surplus; G, thin board wilhholes for thermometers; //, case protecting thermome- ters a-c: I, outside cover. Figure 1 illustrates the general appearance of the liive, showing the live stories. Only one of these w\as occupied by bees, as will be explained. The liive was of the standard 10-frame Langs troth type. Tlii'oughout the experiment it stood on the scales (fig. 2). The several parts were as follows: A. The lower part consisted of a hive body with one side rem vcA To the bottom was nailed a thin cover
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