[No. 144. 313 



effect the drought has upon it, and also the effects of his deep 

 ploughing, subsoiling, underdraining and improved fertilizer, the 

 improved superphosphate of lime, &c. — respectfully report, 



That the committee, consisting of Paul Stillman and P. Zim- 

 merman, of New- York, Amos Gore of Bloomfield, New Jersey, J. 

 Hinchman of New York, A. Moss of Connecticut, H. Cowing of 

 New Orleans, together with the reporter of the New- York Ex- 

 press newspaper, visited the farm garden of Professor Mapes, on 

 Thursday, September 7, 1853. 



The drought had then prevailed for six weeks, with but one 

 shower of about one inch of water. The day was delightful, and 

 although perhaps rather warm, no one regretted the excursion. 

 On arriving at Newark, the Professor was on hand with carriages 

 to convey his visitors to the farm, about three miles out of town. 

 We arrived at about 1 1 o'clock A. M. 



The committee first examined the extensively improved super- 

 phosphate of lime factory of the Professor. This was a range of 

 wooden buildings. A forty-horse power steam-engine at work 

 made about twenty tons of the Professor's fertilizer per day. 

 This work is done at the periods when his hands can attend to it. 

 The Professor stated the following ingredients of the articles, 

 viz., calcined ground bones, 100 pounds dissolved in 56 pounds 

 of sulphuric acid. When this is dry, 36 pounds of Peruvian 

 guano (best kind) and 20 pounds of sulphate of ammonia are 

 mixed thoroughly with it, and the whole mass is then thoroughly 

 ground and incorporated. He sells this product readily for fifty 

 dollars per ton. 



He also manufactures a new manure called nitrogenized super- 

 phosphate of lime, which sells at 2 cents and | of a cent per Ibo 

 It is composed of equal parts of his superphosphate and dried 

 blood, the mixture being thoroughly ground and mixed. The 

 Professor estimates its fertilizing power at about 2| times greater 

 than that of the best Peruvian guano, so that the demand for it 

 was such that he had then on hand (to make it) between /owr and 

 Jive thousand hogsheads of dried blood. 



