252 Forestry Quarterly. 



strips, examining each tree, laying suspected spots bare, and blaz- 

 ing diseased trees for removal. It was found that mistakes were 

 rarely made in knocking off sound calluses. 



After several years the process must be again repeated in order 

 gradually to secure freedom from disease. 



The cost of the operation was about 2^ cents per tree- 



Das Aufsucheti von Schwammh'dumen in Kiefernbestdnden vor der 

 Ausbildung von Fruchttrdgern. Zeitschrift fiir Forst. u. Jagdwesen. 

 Jan. 1912, pp. 42-43. 



In transplanting larger trees, often in- 



Tree sufficient root-system is secured to keep the 



Irrigation. tree alive ; such trees sometimes leafing out 



the first year but succumbing the second. 



Even assiduous watering may not have the needed effect if hot 



and dry weather sets in. 



Dr. Kellerman reports the success of a novel way of supplying 

 the water to a newly transplanted cherry tree which had begun to 

 wilt. He bored a hole nearly one inch deep in the foot of the 

 tree, closed it with a cork through which a glass tube was intro- 

 duced, connected with a rubber tube attached to a vessel with 

 a water jug up in the crown of the tree. 



The vessel was kept supplied with water, of which at first 

 rapidly several liter a day were taken up, later less and less till 

 finally hardly any, when the treatment was discontinued. The 

 effect was immediate ; the rolled up leaves unfolded and the tree 

 recovered. 



A newly transplanted apple tree treated the same way also 

 recovered, but was killed by bark beetles. 



Behandlung von frischversetsten grosseren Bdumen. Praktische Blatter 

 fiir Pflanzenbau und Pflanzenschutz. February, 1913. Pp. 16-17. 



SOIL, WATER AND CLIMATE- 



The measurements of the physical factors 



Ohio of the habitat, according to Dachnowski, 



Peat have not made clearer the nature of the 



Bogs. absorption, tolerance and resistance of 



plants in peat bogs. The daily evaporation 



in a bog forest is about the same as that in a beech-maple forest, 



while in a bog meadow the evaporation is less than on the open 



