Later comparisons by Clarke in the Ordnance Survey Office at Southampton, in 1866, give the mètre as 39·37043 inches.
The French Academy of Sciences by comparison with Sir George Schuckburg’s standard at temperature of 32° F., deduced the mètre as 39·3824 English inches, which reduced to standard temperature of 62° F., would be 39·3711, or slightly in excess of the value deduced by Dr. Young from Pictet’s comparisons.
The legal value in England is one mètre equal to 39·37079, and the latest reduction is 39·37043 inches by Clarke in 1866, which is probably the most exact reduction.
DIFFERENT REDUCTIONS OF THE FRENCH TOISE INTO ENGLISH FEET.
| Captain Kater, 1799 | 6·3945925921 | feet. |
| Hassler, 1832 | 6·3951409 | “ |
| Chambers’ Encyclopædia | 6·39456 | “ |
| “ Mathematics | 6·394662 | “ |
| Wallace | 6·39462 | “ |
| Nystrom | 6·39625 | “ |
| Alexander | 6·39435 | “ |
| Dana | 6·3946 | “ |
The following table of reductions as used shows clearly how great a confusion exists in the matter of comparisons:
MÈTRE IN INCHES.
| Phœnixville Hand-book | 39·368 | inches. |
| Hassler | 39·36850154 | “ |
| “ | 39·370788 | “ |
| “ | 39·3809172 | “ |
| Trautwine | 39·368505 | “ |
| “ | 39·37079 | “ |
| Silliman | 39·368505 | “ |
| “ | 39·37079 | “ |
| Chambers’ Encyclopædia | 39·36850535 | “ |
| “ “ | 39·3707904 | “ |
| Act of United States Congress, 1866 | 39·37 | “ |
| Smithsonian Report | 39·37 | “ |
| Youmans | 39·37 | “ |
| Davies | 39·37 | “ |
| Homan’s Encyclopædia | 39·37008 | “ |
| Weale | 39·3702 | “ |
| Ordnance Survey (England, 1866) | 39·37043 | “ |
| Clerk Maxwell | 39·37043 | “ |
| Capt. Clarke | 39·3704316 | “ |
| J. M. Rankine (1870) | 39·3704316 | “ |
| “ (1866) | 39·3707904 | “ |
| Alexander (weights and measures) | 39·37068 | “ |
| Ganot | 39·370788 | “ |
| Vose | 39·370788 | “ |
| Act of British Parliament, 1823 | 39·37079 | “ |
| Encyclopædia Britannica | 39·37079 | “ |
| Hymer | 39·37079 | “ |
| Davies and Peck | 39·37079 | “ |
| J. W. Clarke | 39·37079 | “ |
| Dana | 39·37079 | “ |
| Whittaker | 39·37079 | “ |
| Sommerville | 39·3707904 | “ |
| Chambers’ Mathematics | 39·3707904 | “ |
| Gwilt’s Encyclopædia | 39·3707904 | “ |
| Gillespie | 39·3707904 | “ |
| Capt. Kater | 39·3708 | “ |
| Appleton’s Encyclopædia | 39·37079 | “ |
| Van Nostrand | 39·3708 | “ |
| D’Aubuisson | 39·3708 | “ |
| Johnson (draftsman) | 39·3708 | “ |
| Encyclopædia Americana | 39·371 | “ |
| Jameson’s Dictionary | 39·371 | “ |
| Herbert’s Encyclopædia | 39·371 | “ |
| Popular “ | 39·371 | “ |
| Molesworth | 39·371 | “ |
| Dr. Young (1802) | 39·371 | “ |
| Wallace (engineer) | 39·371 | “ |
| Nystrom | 39·38091 | “ |
| Hencke | 39·3809172 | “ |
| Act of Canadian Parliament, 1873 | 39·3819 | “ |
| Paris Academy | 39·3824 | “ |
LENGTH OF THE SECONDS PENDULUM AS GIVEN BY DIFFERENT WRITERS.