BAIRD &TXTLOCK (LOM)ON) LTD. 



. * ^ 



.ftr, 



1 



r 



m 



869 



870 



871 



869 1 Glycosometer, Gerrard's, with porcelain dish, clamp and stand . . each 



This instrument consists of a burette graduated to read the percentage of sugar, or graius per 



ounce, in urine, without the need of any calculation. The ordinary method of analysis is em- 



1 'loved, and the whole process is so simple that it can be performed with ease in a few minutes. 

 The Apparatus is recommended in Halliburton "s " Physiological Chemistry," Scott's " Manual 



of Urine Testing," and is used in many Hospitals, and by eminent physicians. 



DIRECTIONS FOR USE. 



Take cither 10 drachms or 10 c.c. of urine found to contain sugar, and dilute with water until it measures 



loo drachms or 100 c.c. Mix well. Now fill the Burette to the zero line with the diluted urine. Next introduce 



I 10 c.c. (2| drachms) Fehling Solution, and 40 c.c. (10 drachms) water into the porcelain dish and boil. Whilst 



boiling, run tho urine from the Burette into the dish in a slow stream until the blue colour has gone from the 



Ft-hling. 



The operation being finished, the level of the urine shows the percentage of sugar present, and the equivalent 

 in grains per ounce is found by reference to the annexed table. 



NOTE. The Instrument is graduated to read percentages of sugar between 10 and i, but should urine 

 contain more than 10 per cent., then dilute 10 volumes to 200 with water, proceed as before, and multiply the 

 'I'M rvcd percentage by 2. If there is less than i per cent, sugar, use undiluted urine, test as before, then divide 

 the reading by 10. 



TABLE SHOWING THE PERCENTAGE EQUIVALENT IN GRAINS PER FLUID^>UNi K 



Percentage. 



10. o .. 



9-5 



9.0 .. 



8.5 .. 



8.0 .. 



7-5 



7.0 .. 



6.5 .. 



6.0 



5.5 .. 



5.0 .. 



4-5 



4.0 .. 



3-5 



3.0 .. 



2.5 .. 

 2.0 



Grains per 

 Fluid Ounce. 

 .. 43.75 



4!-55 



.. 39.4 



.. 37.2 



.. 35.0 



32-8 

 ..30.6 



..28.45 



. . 26.25 

 .. 24.05 

 .. 21.9 



19-7 

 .. 17.5 



1.5-3 

 .. 13.1 

 .. 10.95 



8.75 



Percentage. 

 .9 



870 1 



Pipette, with quartz needle, devised by Dr. Griinbaum, for the estimation of bile salts each 

 'See description in Transactions of the Pathological Society of London, vol. lv., part i, 1904.) 



A. Shows the manner in which the drop falls if needle is clean. 



B. Shows the manner in which the drop falls if needle is greasy. 



12 



056 



CHEMICAL AND SCIENTIFIC APPARATUS AND PURE CHEMICALS. 



