The Cabbage Root Maggot. 523 



These experiments having established the practicabihty of the 

 tarred paper cards, the method was published by Mr. Goff in 1891. 

 We have reproduced Mr. GofFs outline drawings of one of the 

 cards (Fig. 12) natural size, of the cutting tool (Fig. 13) about 

 yi natural size, and of the diagram showing how the tool is to 

 be used (Fig. 14) much reduced. We quote Mr. Gofif's concise 

 descriptions of the cards and tool, and their use: " The cards 

 are cut in a hexagonal form, in order to better economize the 

 material, and a thinner grade of tarred paper than the ordinary 

 roofing felt is used, as it is not only cheaper, but being more flex- 

 ible, the cards made from it are more readily placed about the plant 

 without being torn. 



"The blade of the tool, which should be made by an expert 

 blacksmith, is formed from a band of steel, bent in the form of a 

 half hexagon, and then taking an acute angle, reaches nearly 

 to the center, as shown in figure 14. The part making the star- 

 shaped cut is formed from a separate piece of steel, so attached 

 to the handle as to make a close joint with the blade. The latter 

 is beveled from the outside all around, so that by removing the part 

 making the star-shaped cut, the edge may be ground on a grind- 

 stone. It is important that the angles in the blade be made per- 

 fect, and that its outline represents an exact half hexagon. 



' ' To use the tool, place the tarred paper on the end of a section 

 of a log or piece of timber and first cut the lower edge into notches, 

 as indicated in figure 13, using only one angle of the tool. Then 

 commence at the left side, and place the blade as indicated by the 

 dotted lines, and strike at the end of the handle with a light mal- 

 let, and a complete card is made. Continue in this manner across 

 the paper. The first cut of every alternate course will make an 

 imperfect card, and the last cut in any course may be imperfect, 

 but the other cuts will make perfect cards if the tool is correctly 

 made, and properly used. 



' ' The cards should be placed about the plants at the time of 

 transplanting. To place the card bend it slightly, to open the 

 slit, then slip it on to the center, the stem entering the slit, after 

 which spread the card out flat, and press the points formed by the 

 star-shaped cut snugly around the stem." At a in figure 16 is 

 shown a card properly applied to the stem of a geranium ; b shows 

 a card carelessly put on. 



