632 
AIET’S ACCOrXT OF THE COXSTEUCTIOX OF 
5. That four sets of copies (to be denominated the Parliamentary- Copies) of the 
standards of length and weight be made, in all respects similar to the legal standards of 
length and weight (which are hereinafter denominated the Parliamentary Standards), 
and as nearly as possible equivalent to them ; their difference fi'om the Parhamentary 
Standards, if appreciable, being carefully ascertained ; and that the several Parliamentary 
Copies be distinguished by proper marks. 
6. That one set of the Parliamentary Copies be enclosed in a case hei-metically sealed, 
and imbedded within the masonry of some public budding ; and that the place m which 
it is enclosed be pointed out by a conspicuous inscription on the outside ; and that this 
set of Copies be not disturbed, without the sanction of an Act of Parhament. 
17. That the superintendence of the construction of the new Parliamentary Standards 
be entrusted to a committee of scientific men, to be named by Her Majesty, subject to 
the general instructions which follow. 
18. That the Superintending Committee be instructed to combine, in the way which 
may appear most advantageous, the evidence afforded by the Koyal Astronomical Society's 
scale, by the Royal Society’s scale No. 46, and by the 3-feet bars of the Ordnance Sur^-ey ; 
and by the use of these to construct a new standard of length, representing as nearly as 
possible the same measure as the lost standard. 
19. That the whole length of the bar, or the distance between two points or lines 
marked upon it, be adopted as the Parliamentary Standard of length ; and that the bar- 
bear iro other divisions. 
20. That the question of adopting the whole length or the distance betweeir two 
points or lines, as well as the choice of material, aird the general construction of the 
standard-bar, be left to the decision of the Superiirtending Coirrmittee. 
21. That the length of the irew Parliameirtary Stairdard be oire yard ; there appearmg 
to us no sufficient reason for departing from the length hitherto adopted for the stairdar-d. 
22. That the thermometrical expairsion of the standard-bar be determmed by actual 
experiment oir it. 
23. That the temperature at which the length defined by the standard-bar represents 
the yard be fixed by the Superintending Committee. 
The Report contains other recommendations, relating to periodical comparisons of the 
Standards and Copies, collection of ancient standards, &c., but it does not appear neces- 
sary to allude further to these in the present memoir. 
This Report was presented to the Chancellor of the Exchequer, and after a time the 
following authority for further proceedings was received : — 
“Treasury Minute, dated 20th June, 1843. 
“ My Lords read the Report of the Commissioners for the restoration of the Standards 
of Weight and Measure, presented to both Houses of Parliament in 1841, and advert 
more particularly to the recommendation of the Commission, that a committee of scien- 
tific men should be appointed to superintend the construction of the new Parliamentary 
Standards. 
