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Nitrogen.

Phosphoric Mechanical
Acid.
Analysis.

Station No.

% %% %

% %

% % %

0.275.60 5.87 4.92

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0.265.435.694.92 6.92 11.68 14.00 26.0 74.0 23325 7.14 11.69 14.00 26.0 74.0 23142

8.092.023347 36.0 64.0 23078 53.0 47.023079

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W. C. Mansfield, North Haven. Knowles-Lombard Co., Guilford

Collins & Freeman, Branford... C. Buckingham & Co., Southport.....

J. E. Stoddard, Abington..... Geo. S. Phelps & Co., Thompsonville...

John O. Fox & Co., Putnam

H. H. McKnight, Ellington.... Lightbourn & Pond Co., New Haven.

C. A. Cowles, Plantsville.... F. L. Wadhams & Sons, Torrington.....

H. P. Beers, Greens Farms....

Station agent at factory. . . . . . .

Cadwell & Jones, Hartford.... Station agent at factory. .

F. B. Newton Estate, Plainville

F. Hallock & Co., Derby......

Olds & Whipple, Inc., Hartford.

Spencer Bros., Suffield........

E. O. Chapman, North Haven.. M. E. Thompson, Ellington..........

Hatheway & Steane, Hartford.
Hatheway & Steane, Hartford.
E. F. Clark, Woodbury...
Geo. W. Fraser, Willimantic...

23145 L. T. Frisbie & Co., New Haven Walter T. Clark, Norwich..

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VI. MIXED FERTILIZERS.

MIXTURES CONTAINING PHOSPHORIC ACID AND POTASH. Two samples in which only phosphoric acid and potash were guaranteed were analyzed.

96. Buffalo Phosphate and Potash. International Agricultural Corporation, Boston.

19. Olds and Whipple Bone Phosphate and Potash Compound. Olds and Whipple, Inc., Hartford.

Both samples were drawn by the Station agent. Analyses are as follows:

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Three samples which contain no potash have been analyzed. 36. Olds and Whipple Top Dressing for Grass, 7-4-0. Sampled by Station agent from stock of F. T. Blish Hardware Co., South Manchester.

23198. Olds and Whipple High Grade Tobacco Starter. Olds and Whipple, Inc., Hartford. Sampled by Station agent from stock of E. O. Gates, Pine Meadow.

23061. Shoemaker's Swift-Sure Tobacco Starter, 4-10-0. Sampled by Station agent from stock of F. S. Bidwell & Co., Windsor Locks.

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In both these samples the active insoluble organic nitrogen

was of good quality as judged by the usual methods.

MIXTURES CONTAINING AMMONIA, PHOSPHORIC ACID AND POTASH.

In Table XIV are given analyses of two hundred and ninetynine samples of complete fertilizers. Two hundred and eightytwo were drawn officially by the Station agent and seventeen were submitted by purchasers.

In the column headed "grade" appear the figures which represent the guaranteed amounts of ammonia, available phosphoric acid and potash in the order named; thus, 4-8-4 means that the brand is guaranteed to contain 4 per cent of ammonia, 8 per cent of available phosphoric acid and 4 per cent of potash. In the analyses on the right hand pages of the table the corresponding percentages of these constituents as found appear in bold face type.

CONCERNING GUARANTIES.

Of the two hundred and eighty-two official samples, one hundred and twenty, or about 40 per cent, failed to completely satisfy their guaranties, deficiencies of 0.12 per cent in ammonia, 0.2 per cent in available phosphoric acid and 0.15 per cent in potash being disregarded. Each sample requires three major determinations in order to check the guaranty, hence eight hundred and fortysix determinations have been required for the official samples in this group. Since some samples have been deficient in more than one item, the total number of deficiencies found was one hundred and forty-nine; in other words, about 82.4 per cent of the individual items of plant food guaranteed have been substantially correct or in excess of guaranties.

Taking the total number of samples of each manufacturer who registered three or more brands, and calculating from the analyses the average shortage or overrun in elements of plant food guaranteed, we deduce the following summary:

Of 26 manufacturers,

16 equaled or exceeded guaranties in the three elements.
9 equaled or exceeded guaranties in two elements and were
short in one.

1 equaled or exceeded the guaranty in one element and was
short in two.

Nine of the shortages were in ammonia and there was one each in available phosphoric acid and potash. The ammonia deficiencies ranged from 0.10 to 0.53 per cent; seven were less than 0.25 per cent. The deficiencies in available phosphoric acid and potash were 0.15 and 0.19 per cent respectively.

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