Experiments with Humogen. 9 



SERIES II. 



These tests, undertaken at Professor Bottomley's special request, were 

 on a more extensive scale than Series I, as will be seen from the table printed 

 below. Mustard, Italian Rye Grass, and Dwarf French Beans were the subjects 

 grown, two pots of each per section, the seeds being sown on August 22. 

 The pots were of the same size as for Series I, and similar soil was used. 



General view of the Trials in Series II. 

 DETAILS OF THE DRESSINGS USED. 

 A Control plain soil. 

 B Farmyard Manure, 10%. 

 C Complete Fertiliser 2 ozs. per pot. 

 D Bone Meal, supplied by Professor Bottomley : i^ oz. per pot the same 



ratio as added to the Humogen and Peat tests. 

 E Humogen in 2|% dressings. 



1. Manchester Humogen received in August, 1916, to which Professor 



Bottomley added 4% Bone Meal. 



2. Greenford Humogen, with 4% Bone Meal added by Professor 



Bottomley. 



3. Manchester Humogen, received in Spring, 1916, with 4% Bone 



Meal (Bottomley's) added at Reading. 



4. Manchester Humogen, received in Spring, 1916. No additional 



dressing. 

 F Humogen in 5% dressings. 



1. Prepared as Ex. 



2. 2. 



3- E3- 



4- ' E4- 



G Humogen in 10% dressings. 



1. Prepared as Ei. 



2. 2. 



3- E 3 . 



4- M 4. 



H Common Burning Peat, 5%. 



I Common Burning Peat, 5%, with 4% Bone Meal (Bottomley's) added. 



K Original Air-dried Peat, 5% (unbacterised material as used by Professor 



Bottomley). 

 L Original Air-dried Peat, 5% (unbacterised) with 4% Bone Meal 



(Bottomley's) added. 



Photographs of some of the trials with Mustard and Italian Rye Grass are 

 reproduced on pages 10 and u. 



