August 24, 1871. ] 



JOUENAL OF HOBTICULTUEE AND COTTAGE GARDENEK. 



145 



observant gardener ia likely to notice several moths which, after 

 their night's performances, are about to settle themselves down 

 for their sunlight repose. Should he attempt to start them he 

 will probably be astonished at the curious gyrations of the 

 species known as the Mouse (AmphipyraTragopogonis), should 

 that be amongst them, as might be expected in August. From 

 its peculiar shuifling movements it has received its English 

 name. This is occasionally a garden species, and though the 



caterpillars have been found on various low plants, they have 

 a great liking for Larkspurs. There is only one brood in the 

 year, the eggs laid in the summer hatching, as I suspect, in the 

 autumn, and the caterpillars hybernaticg. At any rate they 

 are to be found feeding in May, being full-fed in that month. 

 There is nothing very particular in tlie appearance of the cater- 

 pillar, the colour being a dull green, sometimes a little lighter, 

 and marked with white and black. — J. E. S. C. 



GROUND LEVELLING AND PRACTICAL GARDEN PLOTTING.— No. 22. 



DRAWING PLANS. 



To draw _/?<;. 46. Draw line 1 7 and divide it into six equal 

 parts, as 2, 3, 4, 5, 6, 7 ; the points thus found being the 

 centres from which to describe circles and arcs to be defined 

 hereafter. Produce 

 the line until it 

 reach the points c c. 

 Draw lines a a, e e, 

 h h, and d d as 

 shown. On line c c, 

 from centre 1, with 

 radius 1 8, draw are 

 8, meeting lines a a 

 and e e ; also from 

 the same point draw 

 arc 9, meeting lines 

 h h and d d. From 

 the same point draw 

 arc 10 and circle 11. 

 In drawing arcs 9 

 and 10, and all cor- 

 responding arcs, it 

 will be found to be 

 better to draw the 

 circles complete with 

 the pencil, as shown 

 by the thick and 

 doited lines. When 

 repeating the work 

 in ink it will be 

 easily seen where 

 the curves meet the 

 straight lines drawn 

 from the outside of 

 circles 1, 2, &c., and 

 the line parallel with 

 it, as shown in points 

 p r. From centre 2 

 draw arcs / / and 

 <7 g, also circle 12. 

 From points p r, on 

 the right side, draw 

 straight lines to 

 circle 11, and on the 

 other side to circle 

 12. In drawing 

 straight lines of this 

 description between 

 two circles, the lines 

 must be drawn so as 

 to touch the extreme 

 edges of the circles, 

 otherwise they will 

 cause an abrupt 

 angle, and so spoil 

 the effect of the 

 drawing. From 

 centres 3, 4, 5, 6, 7 

 draw circles and 

 arcs corresponding 

 to those drawn from 

 points 1 and 2, also straight lines as described. 



To transfer/*;. 46 to the ground. Lay a line from centre 1 

 to centre 7, the distance between being 63 feet, and insert pegs. 

 Divide the line into six equal parts, as 2, 3, 4, 5, 6, 7 ; insert a 

 peg at each point. On each side of the centre line measure 

 9 feet 9 inches, and lay lines as in a a and e e ; measure 7 feet 

 9 inches, and lay lines as shown in b b and d d. From the 

 peg at point 1, with a string 9 feet 9 inches long, trace arc 8, 

 meeting lines a and e ; reduce the string 2 feet, and trace arc 9, 



Fig. 45. 

 Scale 16 feet to the inch. 



meeting lines h and d; again reduce the string 18 inches, and 

 trace arc 10. From the same peg, with a string 2 feet 2 inches 

 long, trace circle 11. In tracing arcs 9 and 10 it is better to 



trace the circle as 

 shown by the thick 

 and dotted lines. 

 From the peg at 

 centre 2, with a 

 string 7 feet 9 inches 

 long, trace arcs /, /, 

 meeting arc 9, as 

 where the lines are 

 cut in ^ )■ ; reduce 

 the string 18 inches 

 and trace arcs g, if. 

 From the same peg, 

 with a string 2 feet 

 2 inches long, trace 

 circle 12. From the 

 point where arc 10 

 is cut in r lay a line 

 to the extreme edge 

 of circle 12, and lay 

 a line parallel with 

 it at a distance of 

 18 inches between, 

 as shown, connect- 

 ing arc 9 and circle 

 12. From where 

 arcs / and g are cut 

 lay a line to circle 

 11 in the same man- 

 ner, and repeat the 

 process from each 

 point until Ihe de- 

 sign is traced, w 

 are walks. c indi- 

 cates coloured ma- 

 terials or bulbs, and 

 B beds. 



To draw fig. 47. 

 Draw centre line a a. 

 On each side of line 

 a a draw lines h 4 

 and c c at an equal 

 distance, as shown ; 

 also draw lines e e 

 and d d. Divide 

 the lines b b and c s 

 into seven equal 

 parts, thus — divide 

 line 6 b into seven 

 equal parts, the first 

 division being showQ 

 in 1 10 ; with radius 

 1 10, from points 1 

 and 10, describe arcs 

 intersecting, as at 

 point 5 ; with the 

 same radius from 

 point 5 set off seven equal parts on line c c. All the points 

 thus found will form equilateral triangles with each other. 

 From centre 1, on line b b, with radius 1 2, describe arc 2, 

 touching line d d ; from the same point describe arcs 3 and 4, 

 also circle 1. From centre 5 describe arcs 6, 7, 8, and circle 5. 

 Describe the remaining arcs and circles from their respective 

 centres in the same manner. From centre 9, on line a a, 

 describe arcs )•, s, and t. From centre 1, with radius 1m, 

 draw arc u. From centre 5, with radius 5 v, draw arc v. 



Fig. 47. 

 Scale 16 feet to the inch. 



