CRUISING WITHOUT THE AID OF A VOLUME TABLE 49 



Each forty cruised will be taUied on a separate sheet, and the tallyman should 

 hence change sheets when a forty has been completed, taking care that the forty 

 number, section number, and direction of course at the top and in the lower right- 

 hand corner of the tally sheet are completely filled out so that the forty can 

 always be located. The different species will be tallied in separate columns. 



Part II. Securing the Height Data 



Since heights will not be tallied in the field it will be necessary to construct a 

 height curve from data collected for each species. For this purpose sufficient 

 time should be taken during the cruising to obtain the necessary measurements. 

 These measurements are made on down trees and as many should be taken as 

 possible. For each down tree measure the D.B.H. outside of bark, width of 

 bark at D.B.H. or as near this point as possible, and the merchantable length 

 from stump to ^ D.B.H. outside bark. 



Part III. The Forest Description 



While running the strips, or at any other convenient time, the cruiser should 

 take notes to be used as a basis in writing a detailed forest description of the tract. 

 Use Form 3 B. All information called for on the form should be obtained. 



Part IV. Office Computations 



The estimate will be worked up and totaled by 40-acre tracts. The volume of 

 all trees above 22 inches D.B.H. except hemlock will be computed in feet B.M. 

 by the method explained in Problem 15, Illustration 1, Method II. Hemlock 

 16 inches D.B.H. and over will be computed in feet B.M. All fir from 16 inches 

 to 22 inches D.B.H. inclusive wih be computed as pihng, and all cedar from 

 10 inches to 22 inches as poles, by cimply noting the number of pieces. All fir 

 and hemlock from 10 inches to 14 inches D.B.H. inclusive will be computed in 

 ties. This will necessitate an estimate of how many No. 1 ties (6"X8"X8') or 

 No. 2 ties (6"X6"X8') an average 10-, 12- or 14-inch tree will contain. 



The following data should be handed in by each party: 



(1) A height curve and a volume curve both on D.B.H. for each species, 



together with the accompanying tables read from them. 



(2) All tally sheets. 



(3) Summary sheet, showing the cruise by species for each forty and totals 



for the tract. 



(4) A forest description of each eighty. Arrange all in neat, logical order. 



D. Reference. — Number 56. 



