toise

The toise was one of the fundamental units of length in France, 12th century – 19th century. by Guilhermoz and others, to trace its origin to ancient ancestors (see, for example, the toise entry in the French Wikipedia). We will only mention that its length and the uses to which it has been put indicate that it originated as a body measure belonging to the fathom family of units.

Beginning in the 17th century, the toise of Paris assumed a starring role in the major scientific investigations of the day. The meter was originally specified in terms of the toise.

1

 In France, a unit of length

Away from the capital, the toise had many, varying local values, some with distinct names such as the toise de Saint-Hubert, the toise de Saint-Lambert, toise delphinale, toise épiscopale,  ; for the size of these and others, please see the table of local values.

toise du Grand Châtelet

A publicly displayed iron standard of the toise at the foot of the staircase of the Châtelet de Paris.

Legend has it that this standard was placed in the time of Charlemagne, which is highly unlikely. Settling of the pier damaged it. and

nouvelle toise du Grand Châtelet

Sometime in 1668 a new iron standard was fastened to the wall. The new version was 5 lignes (about @ millimeters) shorter than the old. Accounts of the origin of the replacement standard differ. Philippe de La Hire at a meeting of the Academy on 1 December 1714. At another meeting, on 29 July 1758, La Condamine stated that the standard was based upon half the width of the inner gate of the Louvre, on the Rue Frontenac side. The standard itself was stolen in 1755, but its length remained the legal standard in France until 1766.

Picard's toise, Cassini's toise

In 1668 these two distinguished scientists made a toise standard for their survey of the length of the meridian passing through Paris. Picard's was too short. Unfortunately, the standard subsequently disappeared.

From toise de l'Académie, toise du Pérou to toise d'ordonnance,

The prototype was an iron bar made by La Condamine in 1735, used in the Academy's meridian-measuring expedition to Ecuador. At that time Ecuador was part of the Spanish Empire's presidency of Peru, and this toise is usually called the toise du Pérou. La Condamine's standard has survived and is preserved at the Paris Observatory.

On 16 May 1766, this toise was made the legal standard for France by an order of Louis XV, replacing the toise du Grand Chatelet. It is about 1.949 meters (about 2.1315 yards). (Doursther gives a value of 1.949 0363 0982 46 meters.)

The surveys by Mechain and Delambre (1791 – 1798), which served to establish the length of the meter, were conducted with the toise du Pérou.

toise in the System Usuelle

In France, December 10, 1799 – January 1, 1840, the toise = 2 meters.

2

In masonry work, at least as early as the 12th century – 19th century, a measure of masonry work based upon the volume of stone or the outside area of a wall, but also upon trade customs. Compare the use of the perch for the same purpose. It occurs widely outside France, for example in the building of castles in Savoy in the 12th century. Doursther (page 527) notes that the toise of masonry in Hesse-Darmstadt is 15.625 cubic meters, and in Lausanne 27 cubic meters. Notice that both these values far exceed the cube of the toise. Commentators have had difficulty in describing this unit and in general, it is not as well-documented as the linear unit. But see Hamon, cited below.

The simplest is the cubic toise, 6 pied by 6 pied by 6 pied = 216 cubic pied. This unit was applied only to rock at the quarry, as a formless pile, and appears to be one of the least commonly-used meanings.

The toise as a measure of masonry in 19th-century Canada is well-described in the quotation below.

Sources

The estimates for all the buildings show that over 40,000 yards of rock were excavated; this would, after allowing for waste, be equal to 3,000 toise, and would construct 9,000 toise of masonry of 54 feet, which was the measure adopted, as the contract recognized 54 feet as the toise.¹ In Toronto a toise² of rubble masonry is 54 cubic feet; when this rule is adopted, the cubic contents of the wall in feet, including half openings, are measured and reduced to the toise. In Ottawa3 and Kingston4 the toise is 62 feet, but walls less than two feet thick, are measured as two feet, and openings under ten feet are not deducted.5 In Montreal the toise is 72 French feet, usually estimated at 86 English feet, being really 86 60/100(illegible?) feet, and one half of all openings over ten feet wide, are deducted. The quarry toise of stone there is 216 French feet, or 260 20/100(?illegible) English feet, cubic6; but in Upper Canada it is 216 English feet. The toise is a French measure for quarry stone. It is a rough pile measuring 6 feet long, 6 feet high, and 6 feet wide,— but the toise of masonry is 72 cubic feet, French. The fact of the difference between the French and English feet not being understood, or its being disregarded, accounts for the 72 English feet being the measure in Ottawa, and 86 English feet in Montreal. If the Toronto toise be used it should be so as there understood, but the rubble masonry for the progress estimates was measured by the toise of 54 feet, but walls less than two feet thick were measured as two feet.7

1. See Contract, Progress Estimates. 2. Grist. 3. Stewart, Fuller, Bowes. 4. Coverdale. 5. Tison. 6. Tison, Stewart, Coverdale. 7. Hutchinson, Bowes.

Report of the Commission Appointed to Inquire into Matters Connected with the Public Buildings at Ottawa.
Quebec: Josiah Blackburn, 1863.

Page 30. All but one of the footnotes refer to individuals testifying before the Commission. The abbreviations in the original have been replaced with individual's names, following the Report's key.

Étienne Hamon.
Évaluer la peine des hommes. La mesure de l'architecture à Paris à la fin du Moyen Âge (XVe - début XVIe siècles).
Histoire et Mesure, volume 16, no. 3/4, placed online 7 December 2005

Access at http://histoiremesure.revues.org/document135.html.

2

In Haiti, 20th century , a unit of capacity, 8 cubic meters.

United Nations, 1966.

3

In Switzerland, a unit of length, 1.8 meters (about 1.968 yards).

4

In Mauritius and the Seychelles, ? – present, two units:

1. United Nations, 1966.

2. From real estate advertisements: www.maurinet.com/pr-rvrem.html and www.spectra.mauritiuslinks.com/land.html. Retrieved 19 December 2006.

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