ANALYSES. 207 



WHANN'S RAW BONE SUPERPHOS- 

 PHATE. 



The above fertilizer, from which samples for 

 analyses were selected, was purchased from the 

 manufacturers' agents, Messrs. Cruft and Young, 

 Philadelphia. It is put up in 200 Ib. bags ; the 

 one purchased weighed 203 Ibs. The mechanical 

 condition of the fertilizer was only middling ; it 

 had not that homogeneous appearance that a first- 

 class fertilizer should present. This condition 

 may be caused by a portion of the Charleston 

 Guano, or other mineral phosphate, of which it 

 is largely composed, being treated with sulphuric 

 acid, and then mixed with another portion of 

 phosphate in its crude state ; and the superphos- 

 phate, taken as a whole, did not present the ap- 

 pearance of being prepared from substances of 

 " animal oriyin" For the benefit of our readers 

 we have collated the following extracts from 

 the circulars of the manufacturers of this super- 

 phosphate. 



No. 1. " Plants during 1 their germination and development 

 require a constant supply of food, arid it is necessary that this 

 nourishment be furnished in such a form as to be at once as- 

 similable, and capable of being immediately useful in sustaining 

 their growth." 



No. 2. " The experience of the most capable agriculturists 

 throughout the civilized world points to the use of concentrated 

 manures ; those which afford all the elements of plant food in a 

 readily soluble form." 



No. 3. "The phosphate of lime, as it exists in bones, is in- 



