IVcig/it and Length of Brook -Trout. 605 



" Thyse ben the xij flyes wyth whyche ye shall angle to ye trought & grayllyng : 

 and dubbe lyke as ye shall now here me tell." 



She then describes " the donne flye, a nother doone flye, the 

 stone flye, the yelowe flye, the black louper, the donne cutte, 

 the maure flye, the taudy flye, the waspe flye, the shell flye, 

 and the drake flye," and gives the months to which they are espe- 

 cially adapted. An idea of her description is given in the following: 



" In the begynnynge of Maye, a good flye, the body of roddyd wull & lappid 

 abowte wyth blacke sylke : the wynges of the drake & of the redde capons hakyll." 



Dr. Bethune says: "The twelve flies in the Berner's Treatise 

 are the substratum of the mystery Colton has built up wisely and 

 correctly." 



"James Saunders, in his 'Compleat Fisherman,' London, 1724, is the first angling 

 author who mentions silk-worm gut (pp. 91-92) ; but Pepys, in his diary, says (March 

 18, 1667) : 'This day Mr. Caesar told me a pretty experiment of his angling with a 

 minikin, a gutt-string varnished over, which keeps it from swelling, and is beyond 

 any hair for strength and smallness. The secret I like mightily' (Vol. III., p. 171, 

 Edition 1828). A writer in the " Field" (Jan. 2, 1864), on the subject of silk-worm gut, 

 says : ' About three months since, Mr. Geo. Bowness, of Bellyard, shewed me an ad- 

 vertisement of his grandfather's, date 1760, announcing that the new article, silk-worm 

 gut, is to be had there. This pretty nearly fixes the date of its introduction into the 

 tackle trade.' " — From Bibliotheca Piscatoria. 



RELATION BETWEEN THE WEIGHT AND LENGTH OF BROOK-TROUT. 



By W. Hodgson Ellis. 



Two summers ago I formed one of a little party of anglers who 

 spent the first three weeks of July and the first week of August on 

 the north shore of Lake Superior. While there we made a number 

 of careful observations of the weight and length of the trout we 

 caught The result of these observations I have collected in a table, 

 showing the average weight corresponding to each inch in length 

 from thirteen to twenty-three inches, the number of observations 

 from which each average was determined, and also the correspond- 

 ing weights calculated on the assumption that the weight varies as 

 the cube of the length. 



Two conclusions may be drawn from these observations: First, 

 that under similar conditions all trout have the same shape. Secondly, 

 that they grow symmetrically ; that is, a five pounder is the same 



