Periodical Literature. 475 



one pound of the dry very poisonous arsenate. The cost is 15 to 

 25 cents per tie as against 50 to 80 cents for tar oil impregnation. 



Centralblatt f. d. g. Forstwesen. August, September, 1909. Pp. 388-90. 



A new safe explosive, called "Ammonca- 



Removal hiicit," for use in removing stumps and 



of roots has been most satisfactorily used in 



Stumps. the Bavarian Forest Department. With 



this safely handled explosive three men can 



get out from 120 to 150 stumps per day. 



Ueber die Stockrodung, etc. Silva. August, 1909. Pp. 565-67. 



Oak floors laid nearly two hundred years 



Oak ago in Versailles and Fontainebleau are 



Flooring. still in excellent state of preservation. The 



famous colonial mansion "Adena" at Chilli- 

 cothe, Ohio, which was built in 1805 still 

 has the original oak floors well preserved. With the advent of 

 the use of White Pine, oak was used to a less extent for flooring 

 except in the finer houses. At this time when kiln drying was 

 almost unknown the more modern methods of heating are said 

 to have been injurious to oak floors. 



The first oak flooring was made by hand, and later it was made 

 from boards which were matched by machinery after being rip- 

 ped to width. Most of such flooring was manufactured at local 

 planing mills and was cut for each separate order. A Wisconsin 

 manufacturer began the practice of cutting hardwood flooring 

 and ceiling into shorter lengths and butting the ends of the pieces 

 by machinery. This was soon followed by end matching of pieces, 

 which was perfected by a Chicago firm and patented. The patent 

 was contested in the courts and at first upheld but later the de- 

 cision was reversed and the manufacture of flooring became an 

 important industry. The present high demand for oak and other 

 hardwood floorings is largely due to the construction of more 

 sanitary floors. 



The Southern Lumberman. 



