1S45.] 



THE CIVIL ENGINEER AND ARCHITECT'S JOURNAL. 



A B-Rad 2"9.'i x2 



BC = AB r> J!ix3U16-r 2 



A E = sinobl. GO'^50' : R:: AB5-59 : AE .. 



B E = K : cotan ohl. GO' 50' : : A B 559 : B E . . 



Angle BCE = nC 8/81 : B E 3-12 :: R : tan BCE 



EC = 6inBCE 19o38';58-:R::BE3-12:EC 



Angle GE11 = DCK, fig. 1 



GE = R : cot G Ell 24° 25' 14" :: GH or B C 8-781 :GE.. 



B D •= A B 5-59 + 2 B B' 2 50 =diamof extrado 8-09 x 3-1416-r 



2 = BD 

 Angle I1E1 = GE 19-337 :GIorBD 12-708 ::R : tanGEI = 



33 18 44", and G EI 33° 18' 44"-GEll 24° 25' 14" = 



IIEI 



59 



781 



401 



-12 



' 38' 38" 



.318 



' 25' 14" 



-337 



1-25 



Tuisling Rules. 



; the diff. of width 



R : tan II E I 8° 53' 30" : : the length 1-2 

 Distance apart on the inlrado .. 



Ditto on the extrado in the ratio of H E to E I 

 Templates AC = 2-823 



0-19 

 2-5 

 = 2-7 



Teniplsle for checks of iotraclo. 



Template for checks of eilrado. 

 B 



A-^ 



Bi'ing niip of tlie divisions on the impost the template placed thereon, 

 on A B and scored along B C. 



Point of tcccntricity on the centre line /or radiation of joints. 

 Rad. 2-795 cotan obi. 60° 50' tan G EI 33° 18' 44"= l-025 = gs, 

 fig. 4. 



The calculations to obtain the twist and eccentricity for the other 

 arcs are performed in a similar manner. 



2nd Rad. 5-927. Angle H E I = 4° 5 1' 23". 



r25 1-25 



TwistiM/ Rules. \j2 H_ 



Eccentricity = Kr, fig. 4, l-SStS. 

 3rd Rad. ] 2-067. Angle H E I = 1" 54' 4 J 



1-25 



Twisting Rules. 



Eccentricity = 6 g, fig. 4, 3-337. 

 4lh Rad. 19-727. Angle H E I = 1° 5' 8". 



1^25 1-25 



Twistinq Rules. \n " ^ 



Eccentricity = m/), fig. 4, 5-243. 

 5th Rad. 31-219. Angle H E I = 0' 40' 11". 

 1-25 1-2 



Tvisting Rules. \n 



Eccentricity = no, fig. 4, 8-166. 

 Fig. 4. Elliptical arch on the skew, showing the direction of the 

 face joints. 



AA' = sinohl. C0°50' : R :: fig. 2 BS 1-25 ; A A' .. 1-431 



Aa = fig. 1 A C '^joos = A / 16-032 and fig. 2 B 14 ; A/ 



16-032 :: fig. 2 Be-.55 : Aa .. .. .. -63 



A « = fig. 2 BO 14 : A/ 16-032 :; fig. 2 Bd 1-78 : A* .. 2038 



A c = fig. 2 B 14 : A/ 16032 

 A d = fig. 2 BO 14 : A/ 16 032 

 A e = fig. 2 BO 14 : A/ 16-032 : 

 A/ 



: fig. 2 B c 4-65 : A c 

 :fig. 2 Hi 7-75 : Ad 

 :fig. 2 Bfl 10-87 : A» 



279 



5-325 



8-875 



12-447 



> 16.032 



The vertical heights from semi-axis to ellipse are the same as in 



fig 2. 



Aj, = fig. 3 AE «Y' = A^ .. .. .. 3-2 



AA = fig. 2 BO 14 : A/16-032 :: B/5-352 : AA .. 6-136 



A i = fig. 2 BO 14 : A/16-032 :: Bm 8-959 :Ai .. 10-259 



A^' = fig. 2 BO 14 : A/16-032 :: Bra 11-698 : Ay .. 13-395 



The distances from the serai-axis to the several centres are the 

 same as calculated for fig. 2. 



Fig. 2*7 = AA 1-865 

 mi = i I 6-808 

 n h =jm 1396 

 Rad 31-219-0 E 6 =/« 25-219 



The points of eccentricity are as calculated fig. 3. 

 Rad 2-795 eccent. j^ s = 1-025 

 Rad 5-927 do. A r = 1-856 

 Rad 12067 do. I q = 3-337 

 Rad 19-727 do. 

 Rad 31-219 do. 



First joint on face At. 

 •458. 



I am, Sir, 



Your obedient servant, 

 Perth, Aug. 5, 1845. James Morice. 



mp = 5-243 

 n = 8-1G6 



Ag3-2 : gs 1-025 : : A A' 1-431 : At 



Carlton Club. — It appears that the members of the club are disposed 

 to be very fickle respecting the selection of designs for the enlargement of 

 their club. They first selected a few eminent architects to furnish designs, 

 and awarded a premium of A'200 to Mr. Salvin for what they considered the 

 best design ; and a second premium of f 100 to Mr. Hopper, for the second 

 best design. Not satisfied, however, with these designs, they determined to 

 select some other architects to make a new design ; and after a severe con- 

 test, it was decided by 220 votes, to employ Mr. Basevi and Mr. Sydney 

 Smirke conjointly against 210 votes for Mr. Barry. The club appeart still to 

 be undecided, having by a late vote, we are informed, postponed the rebuild- 

 ing for another year, when we suppose there will be another contest who 

 shall be the architect. 



37* 



