CENTRAL SCIENTIFIC CO., CHICAGO, U. S. A. 



363 



No. 9298. 



No. 9308. 



o 



Nos. 9322-5. 



No. 9314. 



A 

 9299. 



9302. 

 9304. 

 0308. 



9298. SALT TESTER FOR BUTTER, Nafis. This apparatus is automatic, easy to manipulate, and 

 self-adjusting, and is especially suited for rapid determination of the per cent, of salts in 

 butter. The liquid in the graduated tube instantly readjusts itself to zero so that the only 

 reading to be taken in using the apparatus is at the point on the graduated scale where the 

 liquid surface is located after the test is completed. With a 10-gram sample of butter each cc 

 of solution drawn from the burette will equal % per cent, salt in the butter. Complete as 

 illustrated together with 10-gram weight, 250 cc flask, standard solution in dry form, 25 cc 

 pipette, porcelain cup, stirring rod, medicine dropper, beaker, 2-ounce bottle of indicator, and 



full directions $6.50 



STIRRING ROD, Nans' Faultless, for use in No. 9298 Salt Tester. This rod is colored to show 



the exact tint taken by the sample when the test is complete 15 



SCORE CARDS, Dairy Cattle, in tablets of 50 sheets Per tablet .20 



SCORE CARDS, Market Cream, in tablets of 50 sheets Per tablet .20 



SEDIMENT TESTER for Milk, as described by Professors Babcock and Farrington. Consists 

 of a cylinder 2% inches in diameter and 6 inches long, funnel shaped at the bottom and ter- 

 minating in an opening about 1 inch in diameter. In the cap at the bottom is a wire gauze 

 strainer on which a thin disk of absorbent cotton is placed. After a pint sample of milk has 

 been filtered through the apparatus, the cotton filter, with the dirt which it has collected, is 

 detached and allowed to dry. The amount of dirt obtained will differ with different lots of 

 milk and disks when dry may be returned to the milk producer as evidence as to the clean- 

 liness of the milk. The central cylinder is surrounded by a steam or hot water jacket with 

 % inch intervening space so that the milk can be kept hot and the filtering process thereby 

 hastened. Complete with 500 disks and with bracket for mounting against the wall. 12.00 

 9309. DISKS, Absorbent Cotton, for use with No. 9308 Sediment Tester, in boxes of 100, per box .50 

 9314. SLIDE SCALE, Richmond's, for calculating the total solids in milk, with scale for tempera- 

 ture correction of specific gravity. This slide rule will be found of great advantage and serv- 

 ice to cheese factory men and milk inspectors, as well as those interested in the preparation 

 and examination of milk for use of children and invalids 5.50 



9316. TABLETS, Corrosive Sublimate, for keeping milk samples sweet. Used in making composite tests. 



Will color samples so that danger of mistakes is avoided. Small size will keep samples sweet 

 for two weeks. In boxes of 50 tablets Per box .30 



9317. TABLETS, Corrosive Sublimate, same as No. 9316, but large size, will keep samples sweet for four 



weeks. In boxes of 50 tablets Per box .50 



9322. TESTER, Nafis, for Babcock Test Bottles, made of brass. To make a test, fill the bottle with 



alcohol deeply colored with black aniline or writing ink until it is almost opaque (this does 

 away with the meniscus) so that the highest point is exactly even with the zero mark. Then 

 slowly lower the Tester into the bottle until the liquid rises half way between the two sec- 

 tions. At that point should be the middle mark. After that point is tested for, slowly lower 

 the entire tester into the bottle so that the liquid rises over the top of the upper section 

 about an eighth of an inch. If the liquid is even with the top mark and was also at the 

 middle mark, the bottle is correct. For 6 inch, 10% milk test bottles 1.00 



9323. TESTERS, Nafis, same as No. 9322, but for 6-inch 18-gram cream test bottles. 



No A B C 



For bottles, per cent 30 40 50 



Each 1.25 1.50 1.65 



9324. TESTER, Nafis, same as No. 9322, but for 6-inch, 9-gram, 50% cream test bottles 1.65 



