BAIRD &X\TLOCK. (LONDON) LTD. 



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2657 1 Circular Filters. Schleicher & Schull's, 602. 





2658 T Filter Paper, Free from Starch. Schleicher & Schull's, 581. 



Tn sWt* nf 1 4 b y 5 centimetres} Price 46/- per ream. 

 D1 U5f byigf in. J 2/6 per quire. 



As nearly all filtering papers contain starch, which is troublesome in some analyses especially in such 

 with carbohydrates we have since January, 1892, introduced a paper which is made of a material entirely free 

 from starch. 



The before -mentioned qualities are all hand -made papers thoroughly exposed to the frost during 

 the last winter season, so as to secure the highest degree of rapid filtration and closeness of texture. 



2659 1 No. 601. Paper for Drop Reactions. 



, (22 by 14 centimetres) Price 30/- per ream. 

 In sheets of ) 8 j ^ 5! in . ) i} 8 per quire. 



The peculiar composition and texture of this paper has been found by prominent chemists to be most suitable for drop re. 

 actions. It possesses the property of absorbing a drop rapidly without allowing the same to spread too much, thus giving a much 

 more exact absorption in the analysis of ferro- and ferri-cyanides, phosphoric acid, zinc, iodine, etc., etc., than would be the case 

 by using porcelain plates as heretofore. (By a drop reaction it is meant that, for convenience and saving of test material, a drop 

 of the liquid to be tested is dropped on the paper, and a drop of the reagent is added to it or dropped alongside of it.) 



2660 T No. 566. Extra Soft Thick Filtering Paper. 



In rolls of 25| in. wide and 55 yds. long . . . . price per roll, 12/6 



The great difficulty connected with the nitration of tinct. rhei vinos, tinct. rhei aquos, and solutions of extracts, etc., induced 

 us to make a continuous filtering paper on quite a new system, and after overcoming a great many obstacles, we have succeeded 

 in producing a paper which answers the above purpose in every respect, and according to the judgment of practical men of eminent 

 reputation, we offer the best which has ever been brought into the market for this particular purpose. 



2661 



Filters, Schleicher & Schull's, Brand No. 589, washed with hydrochloric and hydrofluoric acid 

 for analytical work. 



2661 T Black Ribbon. 589. 



This brand black ribbon is soft and of a very loose composition ; it therefore niters very quickly. Filters made out oi 

 this material are used for such deposits which do not pass .through easily, such as is the case with most metals. For this reason 

 these filters have been found specially adapted for use in laboratories for metallurgy. For BaSO^ and similar deposits passing 

 through easily these niters should not be used. 



