68 



Cement Apparatus. For determining the soundness of cement 

 in a few hours. 



Cement Ganger (Faija's). An apparatus for gauging 2 to 4 Ibs. 

 of cement. The cement is reduced to the proper consistency 

 for forming into briquettes to be tested. 



Cement Hopper (Faija's). For determining the weight per 

 bushel of different cements for comparison. 



Cement Needle Apparatus. For ascertaining the time of setting 

 of cement. [17, 21.] 



Cement-Tester. An apparatus to test the cohesion of cement as 

 a homogeneous hard body. [2, 17, 21.] 



Cement-Testing Machine. British standard pattern. An appar- 

 atus for determining, by the application of weights, the 

 breaking strain of prepared briquettes of cement. [2, 17.] 



Cement-Testing Machine. Salter's improved pattern. An 

 apparatus for determining, by the application of weights, 

 the breaking strain of prepared briquettes of cement. [17.] 



Centrifugal Force Machine (Robinson's). An apparatus for the 

 quantitative measurement of centrifugal force. [2, 19.] 



Centrifugal Machine. See Centrifuge. [2, 3, 10, 17, 22, 26.] 



Centrifuge. A centrifugal machine for sedimenting fluids (e.g., 

 blood, urine, sputum, milk, etc.) by the rapid revolution 

 of vessels containing them, for purposes of analysis. [2, 3, 

 10, 17, 22, 26.] 



Centrolinead. An instrument for drawing lines in perspective. 

 [2, 5, 15, 17, 21, 24, 27.] 



Cephalometer. An instrument for measuring the size of the 

 fetal head during parturition. 



Ceraunoscope. An instrument employed in the ancient mysteries 

 to imitate thunder and lightning. 



Chain-Inclinometer. A form of level hi which the inclination of 

 the surveyor's chain is indicated on a scale by the pointer 

 on the end of the level. [15, 20, 21, 27.] 



Chains, Land. Surveying chains for lineal measurements of 

 land. Usually of 100 links, equal to 66 ft. [2, 5, 6, 13, 15, 

 16, 20, 21, 24, 25, 27.] 



Chain Scales and Offsets. For the use of draughtsmen in map 

 measurements. [2, 5, 6, 13, 15, 21, 24, 25, 26, 27.] 



Chapman Hunter Pitchometer. See Pitchometer. 



Charm Compass. See Compass. [2, 3, 5, 9, 13, 16, 17, 20, 21, 27.] 



Chart. Derived from a Greek word signifying a leaf of paper. 

 Applied to any diagram which gives a graphic representa- 

 tion of certain facts, such as barometric, thermometric, and 

 wind charts. It is more generally understood to signify the 

 chart as used by mariners ; gives the representation of a 

 portion of the earth's surface projected on a plane. This 

 may be on the globular, mercator, plane, or gnomonic 

 projection. [13, 15, 16.] 



Chart Dividers. An instrument for taking measurements on 

 charts. [5, 9, 13, 15, 16, 17, 20, 21, 27, 28.] 



