Relazione della Commissione sulla scuola inchiesta, consiglio di stimare una ripartizione, la città di New York .. . 7, Manhattan 161 29, Richmond 59 49, Brooklj-n 154 3, Bronx ! 142 M.H.S., Bronx 132 33, Bronx 143 1, Queens ! 113 6, BrookljTi 155 27, Manhattan 183 135157 59154144132141113155182397 76 3654116452572628586925662 5160435052644741456113931 50554251404550454465 scuole speciali ; 401 scuole di notte 76 13833 ! Totale 1,845 1,854 773 684 658 I METODI DI CAMPIONAMENTO E DI ANALYSISTemperature e umidità. Temperatura e umidità record sono stati ottenuti mediante l'uso ofstandard sling psicrometri degli Stati Uniti

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Report of Committee on school inquiry, Board of estimate an apportionment, city of New York .. . 7, Manhattan 161 29, Richmond 59 49, Brooklj-n 154 3, Bronx ! 142 M.H.S., Bronx 132 33, Bronx 143 1, Queens ! 113 6, BrookljTi 155 27, Manhattan 183 135157 59154144132141113155182397 76 3654116452572628586925662 5160435052644741456113931 50554251404550454465 Special Schools ; 401 Night Schools 76 13833 ! Total 1, 854 1, 845 773 684 658 METHODS OF SAMPLING AND ANALYSISTemperature and Humidity. Temperature and humidity records were obtained by the use ofstandard sling psychrometers of the United States Weather Bureaupattern, with wooden handles and aluminum connections and a coppercase. (See Figure i.) They w^ere obtained from the O. T. Louis Co., New York, or from the makers, The Taylor Instrument Company, ofRochester, X. Y. The instrument consists of two Fahrenheit thermome-ters, fastened to an aluminum back, one of w^hich extends beyond thealuminum case for two inches. Around the bulb of this thermometer isfastened a thin piece of silk cloth, which, when ready for use, is soaked PLATE I. SLING PSYCHROMETER USED IN OBTAINING RECORDS OF TEMPERATURE AND HUMIDITY THE AIR OF NEW YORK CITY SCHOOLS 615 in distilled water. This is called the wet-bulb thermometer. A handleis fastened to the upper end of the aluminum by means of which thepsychrometer is swung when making a test. A copper case is made tosurround the instrument as a protection to the thermometers when notin use. Method for Testing Humidity. The test for humidity was made Ijv dii)ping the wet bulb in water, and swinging it, to prevent the formation of a saturated area aroundthe bulb. Care was, of course, taken not to wet the dry bulb. The rela-tive humidity was calculated from tables as used by the United StatesWeather Bureau. Each psychrometer was tested for its accuracy be-fore using, by immersing both bulbs in a glass of water, under whichconditions both bulbs should read alike. The silk cover was renewed oc-casional

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• bookauthornewyorkn
• bookcentury1900
• bookdecade1910
• bookyear1913