380 PARKS 



below five degrees above zero will cause the ice to crack badly. Cracks may 

 be mended by pouring hot water into them. The equipment necessary for 

 making such a rink and keeping it in condition consists of a hose connection 

 four or five feet under the ground in the middle of one side, or within a 

 near-by building properly located, fifty feet or more of three-fourths inch 

 garden hose, a fine rose sprinkler, one Wimbledon scow (with a sharp two- 

 steel edge), some snow shovels and heavy broom-corn brooms." 



Ice hockey. This game requires an ice surface at least 112x58 feet. 

 At each end of the rink a goal is placed, the uprights of which are four 

 feet high and six feet apart. The goals are frequently provided with nets. 

 It is advisable to surround the rink by a wooden fence or snow bank, which 

 defines the boundaries and also protects other skaters in the vicinity. 



Ski jumps. The following suggestions for the construction of a ski 

 jump for amateurs have been prepared by Fred H. Harris, organizer of 



Jumping Platform _/ Approach 



Jumping Platform 



PLATE No. 172 



ALIGHTING GROUND, THIRTY DEGREES STEEP 

 Outrun Dotted line indicates flight of jumper. 



the Dartmouth College Outing Club. "An ideal ski jumping course consists 

 of the following: Approach, take-off, alighting ground, outrun. As to loca- 

 tion, a hill sloping to the north or northeast is preferable to one sloping 

 in other directions. Approach should give all speed necessary. Take-off 

 should be level or sloping slightly down hill, and angle from approach to 

 it should be gradual. Alighting ground should be thirty degrees steep. 

 Measure this accurately, as it is important in making successful jumps and 

 safe ones. Take-off can be made of piles of boughs covered with snow, or 

 entirely of snow or of planks covered with snow. Take-off should be located 

 back from edge of steep slope. Jumper should never land from take-off on 

 level ground, but must land on the steep slope for safety. The alighting 

 ground at the foot of the hill should gradually grow less steep, until it 

 merges into a safe level outrun where jumper can swing or stop. If jumps 

 of fifty feet are to be made, the take-off should be from three to four feet 



