REPORT OF THE SOCIETY'S CONSULTING CHEMIST. 629 



REPORT OF THE SOCIETY'S CONSULTING CHEMIST. 



By Dr. J. A. Voelcker, M.A., F.I.C., F.L.S. 



The number of samples submitted to me by members during the year 

 1913 was 19, as against 22 in 1912. These comprised the following : — 



Basic slag 

 Peruvian guano 

 Meat meal 

 Lime 



Bastol cake 

 Waters . 

 Soils 



Miscellaneous . 



1 

 1 

 1 

 1 

 1 



3 

 10 

 I 



10 



I. Basic Slag. — This gave the following analysis :- 



Phosphoric acid ..... 7*55 per cent. 



Equal to tribasic phosphate of lime . 16-49 ,, 



Silica ....... 14 49 ,, 



Fineness ...... 83*4 ,, 



This cost 32s. 6d. a ton. It was of low quality and excessively 

 dear in price. 



2. Peruvian Guano. — Analysis: — 



Moisture 



Organic matter . 

 Phosphate of lime 

 Insoluble siliceous matter 

 Nitrogen 



Equal to ammonia. 



15*37 per cent. 

 22-84 

 3096 



21'92 



4- 7 8 



5- 80 



This cost £9 8s. gd. per ton delivered, and was somewhat over-priced. 

 3. Meat Meal. — Analysis : — 



Moisture .... 

 Phosphoric acid . 



Equal to phosphate of lime 

 Sand ..... 

 Nitrogen .... 



Equal to ammonia . 



13- 05 per cent. 

 670 



14- 64 

 6 67 



5'54 

 672 



This manure was in bad condition, containing large pieces of 

 unbroken bone. It cost £6 16s. per ton delivered, and, at current 

 rates, must be considered too dear. 



