45, COKNHILL, E.G., AND 122, REGENT STREET, W., LONDON. 131 



135. Unifilar Magnetometer, Kew Pattern, Portable arrangement, 

 packed in two boxes complete. Price, 70 



136. Kew Pattern Dip Circle, or Inclinometer, of the most 

 recently improved arrangement, complete, with Lloyd's Total Force Apparatus 

 and Kew Verification. Price, 35 



137. Seismograph, Professor Palmeri's recently improved arrangement 

 for recording and measuring the various Volcanic and subterranean tremors 

 and disturbances of the Earth. Price complete in Glass Cases, 150 



138. Van Rysselberghe's Universal Meteorograph. For recording 

 by the aid of Electricity the indications of Meteorological Instruments at 

 regulated periods of time. These records are registered upon a metallic 

 surface every 15 minutes, and from them any number of copies can be 

 produced. Similar to N". & Z's. Recording Thermometers and Hygrometers, 

 Nos. 74 and 103, the Meteorograph can be constructed to register indications 

 of meteorologic apparatus in action at a great distance from the observing 

 station. The simplest arrangement of this apparatus includes a Barometer, 

 Hygrometer, Rain Gauge, and Anemometer, with Direction Vane. Complete 

 with Galvanic Batteries and a supply of Sheets of Zinc, &c. Price, 240 



This price will vary with the number of Instruments of which records are 

 desired. 



139. Solar Intensity Apparatus, Padre Secchi's, for measuring the 

 comparative heat of the Sun's Rays. 



Price complete with three Thermometers, 440 



140. Piche's Evaporimeter with graduated glass Tube. 



Price, 13 



141. Pocket Spectroscope, for observing the Rain Band, fixed slit, 

 in Leather Case. Price, 1 15 



142. Ditto Ditto with adjustable slit and Leather Case. 



Price, 2 10 



143. Direct Vision Rain Band Spectroscope, larger size, of very 

 great dispersive power, in Leather case. Price, 550 



For further description and prices of Electrical Galvanic, Magnetic and 

 Electro-Magnetic Instruments and Apparatus , see special sections at end of this 

 Catalogue. 



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