The art of incubation and brooding; . footof air, tables have been con-structed empirically from experi-ments at Greenwich, combinedwith Regnaults tables of VaporTension, for the use of which weare indebted to the courtesy ofMessrs. Queen & Co., Phila-delphia. If the air be very dry, the dif-ference between the two ther-mometers will be great; if moist,less in proportion, and when fullysaturated, both will be alike. Fordifferent purposes, different de-grees of humidity are required,and even in household use, thathygrometrical condition of theatmosphere most beneficial to oneperson, may frequen
The art of incubation and brooding; . footof air, tables have been con-structed empirically from experi-ments at Greenwich, combinedwith Regnaults tables of VaporTension, for the use of which weare indebted to the courtesy ofMessrs. Queen & Co., Phila-delphia. If the air be very dry, the dif-ference between the two ther-mometers will be great; if moist,less in proportion, and when fullysaturated, both will be alike. Fordifferent purposes, different de-grees of humidity are required,and even in household use, thathygrometrical condition of theatmosphere most beneficial to oneperson, may frequently be found altogether unsui-table for another. Dry bulb 700 and wetbulb 620 to 640 indicate average healthful hygrom-etrical conditions; any other relative condition re-quired may easily be found by experiment, andthen, dispensing with calculations, or reference totables, it is only necessary to see that the two ther-mometers stand in the required relation to eachother. The price of Masons Hygrometer ranges from$ to $ MASONS HYGROM-ETER. fr ^^^^^^^^<^^^<^^45^^^*^«J»^^^^<^^^^^^^^^«Is«I»s}s«Js^^e|s«Js^ •6 TABLES FOR THE USE OF MASONS HYGROMETER. TABLE OF DEGREES. _co A 1Degrees + ex- Leslies Hygrometer compared with Masons, Degrees + ex- V cess x 2 = ab-solute Dryness. cess x 2 = ab-solute Dryness. c*-l tat *Q ° <~ 0 .0 *jd ? s £ a O WG OB S U Q ° H (CO 0 a <s < M cy K«cS«aS cy 0 O 0 0 H-5 69 I. 166 3 22 72 I 6 2083 75 I-5 3-499 9 13 30 332 78 2 0-333 4666 12 13-5 22495 3 499 81 2-5 04165 5 833 15 14 2-333 32666 84 3 18 14-5 87 35 21 15 35-0 90 4 9 332 24 15-5 3-583 93 4-5 0-7495 10499 27 J 16 37-332 96 5 30 165 99 5-5 09165 33 17 283^ 102 6 1 000 36 175 65 I05 65 15 166 39 ! 18 42 0 108 7 1 166 16332 42 i 185 3083 43 166 in
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectincubat, bookyear1894
