396 ANALYTICAL ASSOCIATIONS. 



good immediately the deficiency was observed, showing that 

 they were cases of accidental deficiency that may easily occur, 

 even despite some care on the part of the seller. Other two 

 were found to be guaranteed in such a way as to make ii possible 

 for an inferior and overcharged article to be bought without the 

 buyer having any claim against the seller for the deficiency. 

 These will be referred to again. Another was a sample of 

 manure which was not a manufactured article, and which, 

 though falling beneath its guarantee, was sold at a price far 

 below its value. Out of the nine cases of deficiency there are 

 only two which, upon investigation, have been found to fall 

 within the category which, by Eegulation Ilia., require to be 

 published in this report. One of these was supplied to a member 

 of the Wester Ross Analytical Association. It was a sample of 

 dissolved bones, sold by Messrs D. G. & G. Eoss, Dingwall, to 

 Mr Murdo Bethune, Brae, Dingwall, under the following 

 guarantee : — 



Soluble phosphate, . . . ' 22*4 per cent. 

 Insoluble „ ... 10*2 „ 



Ammonia, . . . 2 "I „ 



It was found to contain, on the average of three very closely 

 agreeing analyses. 



Soluble phosphate, . . . 11*1 percent. 



Insoluble „ ... 24*1 „ 



Ammonia, . . . 1*9 „ 



The defect in this manure is that the soluble phosphate amounts 

 only to half of the guarantee. The amount of insoluble phos- 

 phate is far in excess of the guarantee, and the total phosphate 

 also is about 2J per cent, over the guarantee. But when soluble 

 phosphate is guaranteed and found deficient, it is not to be 

 supposed that an excess of insoluble phosphate is adequate 

 compensation for that deficiency. According to the Society's 

 units, see Appendix B, p. 28, the relative values of the phos- 

 phates guaranteed and those supplied would be — 



Guaranteed. 

 22-4 at 3s. 6d. = £3 18 6 



10-2 at Is. 6d. = 15 3 



11-1 at 3s. 6d. 



24-1 at Is. 6d. 



Supplied. 



^3 14 



There is thus a difference of about 20s. per ton in the 

 value of the phosphates as guaranteed and supplied. But even 

 if the excess of insoluble phosphate had been sufficient to 

 compensate commercia,lly for the value of the deficient soluble 



