g|4 Transactions of the American Institute. 



7. Smaller sets give a larger produce in proportion to their 

 weight than the larger sets. 



8. When the intervals between the sets in rows are diminished 

 to less than a foot, the produce of each individual set is propor- 

 tionately diminished. Though this is not necessarily accompanied 

 by a diminution of the weight of the crop, no increase in the pro- 

 duce of each individual set is caused by placing the sets at inter , 

 vals wider than a foot. 5- 



9. With reference to the relative produce of difi'erent varieties, a 

 late red sort takes precedence throughout the experiments; and of 

 the several varieties of Fluke, "Spencer's King of Flukes," and 

 "The Queen of Flukes," are much more prolific than the ordinary 

 variety. 



As to the manure best adapted to the potato, it was found by 

 Dr. Lang that all nitrogenous dressings tried in Devonshire were 

 rather prejudicial than otherwise, as regards the potato disease, but 

 that wood ashes (which abound in potash), and lime and salt were 

 beneficial. 



Experiments with regard to manures were carried on under the 

 direction of Prof. Voelcker, and on examining them the following 

 deductions have been made: 



1. The best crop was obtained by the use of rotten barnyard 

 manure. 



2. Superphosphate and crude potash salts — a purely mineral 

 manuring — gave a nearly equal increase. The mixture of super- 

 phosphate and crude potash salts appear to be specially useful for 

 root crops on light land. 



3. Common salt enhances the efiSciency of the superphosphate 

 and potash salts, but when used alone it slightly diminishes the 

 crop. 



4. Potash salts applied alone, though by no means the most 

 desirable manure for potatoes, nevertheless had a better efiect than 

 common salt; for while the crude potash salts gave an increase of 

 nearly eight hundred weight per acre, common salt produced seven 

 hundred weight and forty-four pounds less than the uumanured 

 plots on the average. 



TO WHITEN LACE. 



Lace may be restored to its original whiteness hy first ironing it 

 slightly, then folding it and sewing it into a clean linen bag, Avhich 

 is placed for twenty-four hours in pure olive oil. Afterward the 

 bag is boiled in a solution of soap and Avater for fifteen minutes, 



