242 



General Notices. 



Result of the comparative Trials of Strength, &c, of the following Fibres. 



u a 

 « 52 



oi 

 ■a 

 « 

 S 



J3 

 01 



Si' 



Difference of Strength, expressed in Pounds Avoir- 



s 



p 



.a a< 

 -a o ^ 



o & 



■*3 



,a 



$ *8 



dupois, between each of the four Substances em- 





r~ °- 



QJ . 



* 



£ 3 



ployed in the preceding Experiments 



, calculated 







bo"" 



E'*g 



.C 



*<! 



from the Report of the Master Ropemaker in His 



■Ogrt § 



c 01 

 '2 a 



£-2 



01 0) 



*£: 



Cm >. 



o 

 oi 



s 



3 



55 



1 



Ol-o 



8 § 



Majesty's Dockyard. 





br 

 "Z 



g-^ao 

 B.S«S 



— 01 .S 



so.a g ' 



Italian. 



Riga. 1 Pita A. 



Pita B. 





0> oi 



a a 



§?si 



.5 G 



° a 



01 OI 



a a 



to oi g c S' 



a c I •-.= 



bjo qJ 



01 Qj 



.5 a 



hO Qj 









«M 



t-l-S 



&£ 



iJ-S 



ID > 



02 S, 



^3 $S 



J;3 



«l 



hlS 









1 



56 



186 







+ 14 



-7 



+24 



+49 



+ 20 



+ 7 









2 



46 



207 





1 +•■! ! 



+ 10 



+ 10 



+56 



+21 



+42 









3 



49 



307 







+ 13 



+ 121 



+ 13 



+ 131 



+24 



+ 170 

































2-333 





Sum 



151 



700 







+41 



+ 124 



+47 



+236 



+ 65 



+219 





Mean 



50i 



23S£ 



+ 14 



+ 41^ 



+ 15a 



+78| 



+21J 



+73 







1 



4a 



193 



—14 



+ 7 1 





+ 10 



+56 



+ 6 



+ 14 







2 



32 



197 



—14 



-10 





— 4 



+46 



+ 7 



+32 









3 



36 



186 



—13 



—121 











+ 10 



+ 11 



+49 







Riga. 



























2-250 



Sum 



110 



576 



—41 



—124 



+ 6 



+ 112 



+24 



+ 95 



Mean 



361 



192 



—14 



—41 £ 





+ 2 



+37| 



+ 8 



+31| 





1 



32 



137 



—24 



—49 



—10 | 





— 4 



42 







2 



36 



151 



—10 



—56 



+ 4 





+ 14 



—14 









3 



36 



176 



—13 



—131 







+ 11 



+39 





























0-625 





Sum 



104 



464 



—47 



—236 



—6- 









+ 18 



—17 





Mean 



34§ 



154| 



—151 



-78-; 



o 





+ 6 



— 5§ 





1 



36 



179 



—20 



— 7 



— 6 | +14 1 + 4 



+ 42 











2 



*5 



J65 



—21 



—42 



7 — 32 J 11 



+ 14 













3 



25 



137 



—24 



—170 



—11 1 —49 J —11 



39 

































0-625 





Sum 



86 



481 



—65 



—219 



—24 —95 



-18 



+ 17 









Mean 



28| 



160J 



— 21 J i —73 — 8 ] —311 



1-6 



+ 51 



"Weight of equal lengths of 



Riga hemp, 2'1 oz., or 2'000,558 lbs. 

 :«, Pita, - P14 oz. 3 or 1-007,812 lbs. 



W. HAMILTON. 



Dr. Hamilton, in a previous letter, mentions also the Pita de Tolu. This, 

 he observes, " grows in large quantities at Tolu, is probably a species of 

 Agave, and yields a fibre coarser and browner than that of the Pita de 

 Guataca, and inferior in quality. The value of the fibre of Pita de Tolu 

 is, in Carthagena, from ten to twelve dollars for 100 lbs. Spanish; that of 

 the Pita de Guataca, more. 



We understand that a plant or two of the Pita de Guataca are now 

 growing with Mr. Anderson, hi the Apothecaries' Botanic Garden, Chelsea ; 

 they having been received there from Mr. Lambert. 



Dr. Hamilton, in a letter dated Dec. 24. 1831, has sent us the following 

 extract from a letter he had lately received from Jamaica, bearing date 

 Sept. 3. 1831 : — " The Pita plants, I am happy to inform you, are thriv- 

 ing. They are too few, however, and still too young (they were only in- 

 troduced from Carthagena last spring by the packet Emulous) to afford a 

 supply of the leaves for any experiments. There can be no doubt, how- 

 ever, that it admits of being cultivated in our dry sandy savannahs, which 

 are at present uncultivated and unproductive. Should you observe any 

 further information respecting the improved machine which has been pro- 

 posed for the preparation of hemp, I shall feel obliged by your communi- 

 cating it. There is a great number of plants in this countiy from which a 

 texture of the hemp kind may be obtained, the trouble of the preparation 



