The art of incubation and brooding; . t. Youmay say, • If moisture affects a mercury thermo-stat, why will it not affect a mercury thermometer?It does ; but a comparatively small amount ofmercury is used in a thermometer. As a proof ofthis assertion, look at the very best hygrometers,which are made by using a wet and a dry bulbthermometer. Notice the difference between the116 •^^^^^^^^5^^5js^S5^ej5e|s«Js«JseJsej5^5eJs«Js«j5 5j5ej5«|s«JseJse^5t|s«|5«Jse^5 «£>«£>ejssjstjssjse^^say «0 temperatures of the wet thermometer and the dry-one. If moisture affects a small amount of mer-cury that mu
The art of incubation and brooding; . t. Youmay say, • If moisture affects a mercury thermo-stat, why will it not affect a mercury thermometer?It does ; but a comparatively small amount ofmercury is used in a thermometer. As a proof ofthis assertion, look at the very best hygrometers,which are made by using a wet and a dry bulbthermometer. Notice the difference between the116 •^^^^^^^^5^^5js^S5^ej5e|s«Js«JseJsej5^5eJs«Js«j5 5j5ej5«|s«JseJse^5t|s«|5«Jse^5 «£>«£>ejssjstjssjse^^say «0 temperatures of the wet thermometer and the dry-one. If moisture affects a small amount of mer-cury that much, what will it do with from twentyto forty times the bulk? Iron and steel are tooslow to contract, or return. Gold and silver aretoo expensive, and are not equal to brass as ametal part. Remember that there are many kindsof brass, and all kinds will not answer. Liquidsare not safe; besides the danger of a leak, theexpansion and contraction of the metal in whichthey are confined must be overcome or compen-sated MOISTURE GAUGES AND HYGROMETERS. We have experimented with many moisturegauges and hygrometers both inside and outsideof incubators, and have not found them of anypractical use inside of an incubator. The majorityof those offered to poultrymen are not at allIr7 ^^«J»«$»^^^ej9e^^^e|9^^^^^^^ej9^-^^e^^«£^^^^^«^^e£>e£(^^e^^^^l^ ^ 5^ ?h «J»3? «!*«£» sfe «i? sfcsfcgfc «b sb *i? i ,;f> «i? *i? »i? «t sb ?4? 4s *•£•> as ^• *fc 4- dj sfe ?fe *£•sb ?i? t ^? ?fc d? 4? <& ^ reliable, and many of them should be classed withtoys. For instance, we have two of the same makeand kind, and placed them side by side, and foundthem indicating different degrees of have then placed a high-priced hygrometerbetween them and corrected both to correspondwith the high-grade instrument. In a few hoursNo. i would mark 700 while No. 2 would point to900 while the standard instrument indicated , when No. 1 was at 900 N
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectincubat, bookyear1894
