240 JOUENAL OF THE ROYAL HORTICULTURAL SOCIETY. 



ANNUAL KEPORT OF CONSULTING CHEMIST, 

 De. J. A. VOELCKER, M.A., F.I.C., F.L.S. 



DuBiNG the year 1906 twenty-seven samples were submitted to me by 

 twenty- two different Members of the Society for analysis. 

 The list is as follows : — 



Superphosphate 

 Basic slag . 

 Shoddy 

 Hop manure 

 Vine manure 

 Waste materials 

 Soils . 

 Waters 



1 

 1 



2 

 1 



3 

 2 

 6 

 11 



27 



The sample of superphosphate was of good quality, giving 33-07 per 

 cent, of soluble phosphate. 



The one sample of basic slag was also good : it contained 46*78 per 

 cent, of phosphate and had a " fineness " of grinding of 88*5 per cent. 



The three manures sold as " vine manure " were analysed with the 

 following results : — 



Soluble phosphate 

 Insoluble phosphate 

 Total nitrogen . 

 Equal to ammonia 

 Potash 



A. 



B. 



c. 



17-79 



15-71 



12-22 



2-71 



11-51 



7-88 



7-85 



4-37 



5-67 



9-53 



5-31 



6-88 



9-05 



5-71 



2-87 



The prices per ton were as follows : — 



A. 

 B. 

 C. 



£13 10s. 



£8 



£13 OS. 



Of these b was the only one that at all approximated in value to 

 the prices at which the manures were respectively sold, the other two 

 being excessively dear. 



A waste material, offered at 12s. 6cl. per ton, gave the following 

 results : — 



Moisture . 

 *Organic matter . 

 fPhosphoric acid 



Lime 



Oxide of iron &c. 



8-10 

 4-43 

 1-02 

 10-53 

 3219 



Sand 43-73 



100-00 



*equal to tribasic phosphate of lime .... 2-22 



fcontaining nitrogen '08 



equal to ammonia '10 



