METHOD.
The method employed in the determination of the tin was simply as follows:
The contents of each can were emptied into a large porcelain dish, and the condition of the inner coating of the can noted. After thoroughly mixing the contents, fifty grammes were weighed off and incinerated in a porcelain dish of suitable size. The residue was treated with a large excess of concentrated hydrochloric acid, evaporated to dryness, moistened with hydrochloric acid, water was added, and the mass was filtered and washed, the insoluble matter being all washed upon the filter. After drying the filter with its contents, the whole was again incinerated in a porcelain dish and the residue treated as before. The solution thus obtained was properly diluted and saturated with hydrogen sulphide. After standing about twelve hours in a covered beaker the precipitate was filtered off and the tin weighed as stannic oxide.
RESULTS OF EXAMINATION.
Serial No. 552.—Sample of canned pumpkin, received of F.A. Derthick, April 22, 1890, sent by Albert F. Remy & Co., Mansfield, Ohio. Pie made from it supposed to have made a man and woman sick. The attending physician pronounced the case one of lead poisoning.
| Per cent. | |
| Tin dioxide with trace of lead | 0.0424 |
| Grains per pound | 2.97 |
| Equivalent to stannous chloride | 3.74 |
| Minimum doses | 51.4 |
| Maximum doses | 6.4 |
Serial No. 563.—Sample of canned pumpkin, received of Edward Bethel, June 27, 1890. Labeled: Choice Pie Pumpkin, packed at Salem, Columbiana County, Ohio, by G.B. McNabb, sent by A.F. Remy & Co., Mansfield, Ohio.
| Per cent. | |
| Tin dioxide | 0.0444 |
| Grains per pound | 3.11 |
| Equivalent to stannous chloride | 3.91 |
| Minimum doses | 56 |
| Maximum doses | 7 |
Can eroded.
Serial No. 565.—Sample of canned pumpkin, bought of T.B. Vaure, July 11, 1890. Labeled: Belpre Pumpkin, Golden. George Dana & Sons, Belpre, Ohio.