54 EXPEFvIMENTS WITH llEFERENCE TO THE POTATO DISEASE. 



It is necessaiy to observe that this row had not a row of po- 

 tatoes next to it on one side, but a row of Mazagan beans. 



Beans planted with the Potatoes. — Table I. 43. At the dis- 

 tance of 2 feet 4 inches from the last row in the preceding 

 experiment, a row of Mazagan beans was planted; 2 feet 4 

 inches from this a row of potato-sets and Mazagan beans alter- 

 nately ; and again, at the distance above-mentioned, another row 

 of Mazagan beans only. In the row, planted alternately with 

 potatoes and beans, the potato-sets were placed 16 inches apart 

 instead of 8 inches, as in the previously detailed experiments ; 

 and between every two sets a Mazagan bean was sown. The 

 proportion of produce diseased was nearly 12 per cent. Planting 

 with beans, therefore, appears no effectual remedy against the 

 potato disease ; but the result of the experiment deserves notice 

 in another point of view. Although planted at double the usual 

 distance, only 24 plants of potatoes instead of 48 being in tlie 

 row, the amount of sound produce was at the rate of 10 tons 

 16 cwt. 18 lbs. per acre. From sets planted at half the distance 

 in the row without beans, 26 results out of 47 will be found in 

 the Table, with less amount of sound produce than was afforded 

 by the potato plants in this row, where they alternated with 

 beans. Such being the case, the experiment of growing beans 

 with potatoes certainly deserves extensive trial. The bean plants 

 grew very well till attacked by insects, as was the case with this 

 crop generally in the past summer, and to an extent that rendered 

 it impossible to make any just estimate of their produce. 



Crushed Oil-seed, the fresh seeds of " Gold of Pleasure," 

 (^Camelina sativd). — Table I. 44. This was scattered in the 

 drill as manure previously to planting the sets, the quantity being 

 the same as that of the powdered oil-cake already noticed, namely, 

 1 lb. 9 oz. to half a row ; estimated quantity per acre, 10 cwt. 

 46 lbs. The result was not favourable, for the sound produce 

 was less than that from the other half of the same row wjiich 

 had nothing, whilst the per-centage diseased was nearly double. 



Poivdered Oil-cake, from seeds of " Gold of Pleasure." — 

 Table I. 46. This was applied in an equal quantity, and in the 

 same manner as tlie crushed oil-seed in the preceding experi- 

 ment. The sound produce was at the rate of 2 tons 19 cwt. 50 lbs. 

 per acre below that from the other half of the same row to 

 wliich nothing was applied ; but the proportion diseased was the 

 least that is indicated amongst all the results in Table I., being 

 scarcely 3^ per cent. 



Potato Plants shaded hy Indian Corn. — Table I. 48. The 

 Indian corn could not be planted in the compartment in which 

 the preceding experiments were made, because its sliade would 

 have more or less affected adjacent rows not intended to be in- 

 fluenced by it. A row of potatoes was therefore planted in the 



