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Branches Boston New York Philadelphia Pittsburgh Akron Birmingham The Bristol Company Waterbury, Conn. (Established, 1889) . Manufacturers of Indicating, Re cording and Controlling Instruments. TftAOC MASK BRISTOL'S REO.U.9.PAT. OmcK Branches Chicago St. Louis Detroit Denver Los Anceues San Franc,so, Humidity Recorder Controller Recording Thermometers--For all co A new development for automatically controlling atmos pheric temperature in relation to hu midity. Extensively used in dry kilns, textile mills, etc. Suitable for both progressive and charge type kilns. Recorder and Con troller operate from one sensitive bulb, but otherwise the sys tems are entirely independent. The equip ment is reliable in its action and not de pendent on auxiliary equipment. The Recorder chart is 10-in. size. Case con struction is moisture-proof. Simple to install and operate. mercial ranges from -- 60 and + 1000 F. Fur m' nished with plain bulbs for use in open spaces; or bulbs with union and screw connections for recording tem peratures of liquids in closed spaces under pressure. Il lustration is an out door atmospheric recording thermometer Sensitive-Bulb located in weather house exposed to elements; instrument located within building. Chart may be 12 or 8 in and provide record for 24 hours or 7 days. Handy Portable Recording Thermometer-- Especially useful for recording tempera tures in cold storage Valves rooms, refrigerating units, dairies, green Bristol's Motor Op houses, dwellings, erated B K Valve used in steam and spray line, operates under theatres, hospitals, . schools, hotels, etc. Available for suitable the guidance of con temperatures from troller. Compact in -- 30 to 150 F. Chart size 4 in., ranged for design and available continuous record of 72 hours. Rugged, in body sizes for light in weight and easily portable. Case can to 23'2-in. pipe sizes. be furnished in either white or black enamel. Standard motor volt age and frequencies available. Thermostat Temperature Controllers--For automatically control ling temperatures up to 1000 F. this type of in Recording Psychrometers Where Automatic Temperature and Humidity Control lers are not used a Recording Psychrometer will guide operator in regulating spray and steam lines. strument gives excellent results. Used for such applications as cooling chambers, room temper atures, ovens, pasteurj izers chronium plating, etc. Recording PressureandVacuum Gauges-- For securing continuous records of pressure or vacuum. For steam, air, gas and liquids. Charts Suitable for use furnished to read in wherever a knowl pounds, ounces, inches, edge of relative hu feet, metric or any de midity is necessary sired unit. For ranges, to efficient opera tion. from full vacuum to 12,000 lb. per sq. in. Instrummls < Consolidated Ashcroft Hancock Go., Inc. " Bridgeport, Conn. BRANCHES IN PRINCIPAL CITIES Makers of AMERICAN INDUSTRIAL INSTRUMENTS--Since 1851 Subsidiary of Manning, Maxwell and Moore, Inc. hirers of Indicating and Recording Gauges; Gauge Testers: "IT* Gauges; Draft Gauges; n<j Recording Thermometers; Tachometers; Dial Thermometers; Pressure and r-l^^l!rire Controllers; Electric Temperature Controllers: Pop Safety and Water Relief jveS. Steam Traps; Engine Indicators; Counters: Absolute Pressure Gauges. _oiiiifacturers of Bronze, Cast Steel and Forged Steel Valves, Locomotive and Engine Room `^j^gTiiarometers; Mercury Column Gauges; Steam Whistles; Hydraulagraphs; Gauge Boards. Ashcroft American Gauges--Ashcroft American Gauges are made in all sizes from *214 to 12 in., for pressures from 8 oz. to , 25fi00 lbs. and also for vacuum. Cases : grecast iron or cast brass. The move ments are Heavy ' Duty and all bearrings are Monel Met al. Write for Cata- log No. A-59. For Mercury Pressure and Vacuum Gauges, "U" Gauges, Draft Gauges and Mercurial Barometers, write for Catalog B-59. American Recording Gauges--Ameri can Recording Gauges are made for all pressures from 15 in. of water to 10,000 lbs. and for vacuum. ----- They.are made in one size only to accom modate a 10 in. chart, having an effective scale width of 3% in. The case is Die Cast with a dull black hard-rubber finish and with either bot tom or back connection. The pen-arm is made of non-corrosive Monel Metal and is of the inverted type. Operating instruc tions are lithographed on the chart plate so that they cannot be lost. Especially designed Seth Thomas clocks are used; and all customary time periods can be furnished. American Recording Gaugesare eq uipped with the Time Punch which virtually makes each instrument a time clock, since a hole is punched in the chart whenever a reading is taken. Write for Catalog E-59. American Air Duct Thermometer--Designed especially for both warm and cold air ducts. Fitted with polished brass "V" shaped case, glass front. Furnished with 9-in. or 12in. scale graduated 0-160 F. Write for Catalog F-59. American Recording Thermometers-- Made for recording, temperatures from minus 40 to plus 10007 F. or equivalent C. Very flex ible connecting tubing up to 200 ft. One size only to accommodate 10 in. chart, with an effective scale width of 3% in. Same case as for the American Recording Gauge, so that all instru ments are uniform in ap pearance when mounted on Gauge Boards. Ameri can Indicating Gauges and Dial Thermometers are also furnished in same case. Write for Catalog H-59. American Dial Thermom eters--A m e r i c a n Dial (mercury-filled) Indicating Thermometer has the accu racy of the standard glass tube thermometer and the reading convenience of a dial face. Entire working mechanism is made of steel, meaning long life. Standard size of dial 6 and 12 in. Furnished with rigid connection or flexible capillary steel tubing up to 200 ft. long. For temperature ranges from minus 40 to plus 1000 F. Write for Catalog G-59. American Precision Temperature Controllers--Self-operated and simple in construction. For regulating tempera tures from 25 to 385 F. Under fa vorable conditions temperature will be held within 1. Sen sitive, rugged and accurate. For hot water service tanks, water heaters, etc. Standard ranges carried in stock. Size of valve must be specified. Write for Catalog R-59. 729 X'