In the most fortunate cases one calculated by using the old toise (6 pieds de roi ) of which good standards were available, and then converting the datum into meters at the ratio established in fixing the Paris meter, which was calculated as a fraction of the toise du Perou kept by the Academie des Sciences.
(one; calculated; by using the old toise) (the Paris meter; was calculated; as a fraction of the toise) (good standards; were; available; L:In the most fortunate cases) (the ratio; established; L:in fixing the Paris meter)
one the Paris meter good standards the ratio
calculated was calculated were established
by using the old toise
as a fraction of the toise
available L:In the most fortunate cases
L:in fixing the Paris meter