A WEEKLY ILLUSTRATED JOURNAL OF SCIENCE 



" To the solid ground 

 Of Nature trusts the mind which builds for aye." — Wordsworth 



No, 514, Vol. 20] 



THURSDAY, SEPTEMBER 4, 1879 



[Price Sixpence 



Registered as a Newspaper at the General Post Office.] 



[All Rights are Reserved. 



CHAKM COMPASSES. 



Fig. I. 



Fig. 2. 



Fig. 5. 



Fig. 6. 



TRANSPARENT PEBBLE 



Fic. 7. 



COMPASSES. 



Fig. 8. 



Tliese form a very useful and handsome appendage to the watch chain, combining a trustworthy Compass, Magnifier, and 

 IJurninj Glass. 



The Compass consists of two optically worked convex Brazilian pebble lenses, one on each side ; the magnetic needle is poised 

 between the two pebbles, which are cupped on the inner surfaces to receive its pivot. 

 Flo. I. — Plain Band Pebble Compass, diameter | in., i5carat gold, f,\ is. od, ; silver, 15J. 

 Do. do. diameter \\ in. ij-carat gold, £1 ^s. od, ; silver, iSs. 6d. 

 Do. do. di.-imeter l.fV in. 15-carat gold, £2 os. od. ; silver, 25/. 

 Fig. 2.— Square Capped Compass, stout case, J in. diameter, Ij-carat gold £1 los. od. ; silver 15^. 

 Do. do. I in. diameter, 15-carat gold, £2 12s. od. ; silver, 18/. 6d. 



3. — Enamel Block Pattern Compass, points of compass enamelled on the gold mount, diameter ]i^ in,, IScarat gold, ^fj lis.od. 

 Do. do. \i in. diameter, 15-carat gold, £4 ^s. od. 



4. — Bead edge on Belcher Box Compass, ^ in. diameter, 1 5-carat gold, £1 iSs. 6d. 

 Do. do. IJ in. diameter, l5-carat gold, £2 los. od. 



5. — Fetter Linlc Charm Compass, 4 in- diameter, 15-carat gold, £2 2s. od. ; silver, 21s. 

 Do. do. IJ in. diameter, I5carat gold, ^■3 5^. od. ; silver, 28j. 6d. 

 Fig. 6. — Stout Belcher edge, engraved case. Singer's patent pearl dial, new stop, \^ in. diameter, l5-carat gold, £2 los. od. } 

 silver, 20s. 

 Do. do. 4S '"• diameter, IScarat gold, £2 tp. 6d. ; silver, 22^. 6d. 

 Fig. 7.-^Gold Revolving Ball, with Needle Compass, engraved case, | in. diameter, IS-carat gold, £1 Js. 6d. 



Do. do. /u in. diameter, 15-carat gold, £1 17.?. 6d. 

 Fig. 8. — Cross Bar Pattern Seal, with stone back, Singer's patent pearl dial compass, fj in. diameter, IJ-carat gold, £4 os, od. 



JOHN BROWNING, 63, Strand, W.C, London. 



Fic. 



Fio. 



Fig. 



