2V 



Experiments icith Peruvian Guano. 



and 10 lbs., or 1 gallon, of water. The guano, or guano-mixture, 

 as the case might be, was sown by hand on the top of the dung 

 before it was ridged in, and the seed was drilled on the ridges, 

 alone in experiments 1 and 2, and with the superphosphate of lime 

 in experiments 3 and 4. 



Table I. shows the results of experiments 1 and 2, without the 

 superphosphate. 



Table I. 



It is seen that there wore about 18,^ cwts. more root, and about 

 •^ cwt. more leaf with the guano without, than with the guano with 

 sulj)huric arid. There were also about 1300 more roots per acre 

 Avithout, than with the acid. The season was, as already said, 

 very unfavourable for growth, and the difference of the produce 

 in the two cases is comparatively smalj ; but, such as it is, 

 it certainly does not show any beneficial effect from the use of 

 the acid. 



Table II. shows the results of two experiments parallel in 

 every respect with the two former, excepting that with the dung 

 and guano of the one, and with the dung and prepared guano of 

 the other, superphosphate of lime was also employed. 



In this experiment the result is almost exactly as much in 

 favour of the prepared guano as it was against it in the former 

 case. Taking the one set of experiments against the other, there- 

 fore, it would appear that in the particular season in question the 

 effect of .a given amount of guano was about the same with and 

 without the addition of the sulphuric acid. 



It may be noticed, in passing, that the beneficial effects of 

 superphospate of lime in preserving the plant in a bad season, 

 are very apparent in the much greater number of plants grown 

 per acre when it was used. 



