50 
Result, two days later, plant untouched ; grub active, but seemingly 
unaffected by application. 
Experiment No. 13.—October 6, earth in field in the vicinity of wheat 
plants being destroyed by white grub, thoroughly drenched with decoc- 
tion of Burdock leaves. . 
Result of examination on October 14: The grub was found a short 
distance from the plants uninjured, it having evidently destroyed several 
after application of liquid. 
Experiment No. 14.—October 3, earth about wheat plants, being de- 
stroyed in field by white grub, thickly covered with fertilizing salt and 
drenched with water. 
Result of examination October 14 exactly as in the preceding, except 
that the grub was at a greater distance from plants. 
Up to the present time, no Dipterous parasite has been recorded as 
preying upon white grubs, as the subterranean habits of the pest con- 
tributes to its protection in this respect. There is, however, pretty 
good evidence that there is at least one species of fly which exists to 
some extent in holding these grubs in check. On September 21, while 
who advertises both as not ouly being excellent fertilizers, but also very destruc- 
tive to insect life, especially chinch-lugs and cut-worms. 
The following analyses were kindly made for me by Prof. Henry A. Huston, chemist 
of Indiana experiment station: 
I. Phosphate salt. 
A. Qualitative analysis. 
Bases present: Acids present: 
Calcium, Hydrochloric, 
Sodium, Sulphuric, 
Iron, trace, Carbonic, 
Aluminium, trace, Silicic, trace, 
Magnesium, trace, Phosphoric, trace. 
Organic matter, trace. 
Principal constituents: Common salt, gypsum, carbonate of lime. 
B. Per cent. phosphoric acid present, .03. 
Il. Fertilizing salt. 
A. Qualitative analysis. 
Bases present: Acids present: 
Sodium, Hydrochlorie, 
Calcium, trace, Sulphuric, trace, 
Organic matter, trace, Silicic, trace. 
Phosphoric, slight trace. 
Chief constituent: Common salt. 
B. Quantitative analysis. 
Per cent. 
Salti(Na@l) coco ae = meinem sae olen oa mie inl ole me mlm ale nim iminielin elle 97.70 
Gypsum (CaS) 222 6<.- <p mcee wee steiemiel ss = = =a! eeleeee else sls ie ae plone 44 
Insoluble matter:- <=: .ccoceusceceicc secs occ caves eee Renate eee % aay 
MOIsture <22 2222523. sess wee eee e meinen oles mentee stalo hie aisles ate eee eee tn 1. 09 
Soluble organic matter, and loss-=-2<..--+->- ess -- oe eee en eee eee eee . 30 
Total scccen sepccnecee ceo eeee et ee ee eye eee eae eee eee 100. 00 
Samples drawn at experiment station from full sacks, special care being taken to 
insure fair samples. Neither of these samples contain an appreciable amount of 
phosphoric acid, potash, or nitrogen, 
j 
