5.807
1950 11.114
1955 12.265
1955 (world: about 56)
1960 17.202
1962 19.060

Sources: U.S. Bureau of the Census. _Historical Statistics of the United
States 1789-1945_ (1949); _Statistical Abstract of the United States._

ELEMENTAL PHOSPHORUS

annually produced in the United States in short tons (2,000 lbs.)

1939 43,000
1944 85,679
1950 153,233
1956 312,200
1958 335,750
1959 366,350
1960 409,096
1961 430,617
1962 451,970

Source: U.S. Department of Commerce.

FOOTNOTES:

[1] WILHELM HOMBERG, _Memoires Academie, 1666-1699_ (Paris, 1730), vol.
10, under date of April 30, 1692, pp. 57-61.

[2] FORTUNIO LICETUS, _Lithiophosphorus sive de lapide Bononiensi_
(Venice, 1640).

[3] Cited in PETER JOSEPH MACQUER _Chymisches Woerterbuch_, 2nd ed.
(Leipzig: Weidmann, 1789), vol. 4, p. 508, footnote "c" as "Kletwich (de
phosph. liqu. et solid. 1689, Thes. II)."

[4] FERDINAND HOEFER, _Histoire de la Chimie_ (Paris, 1843), vol. 1, p.
339.

[5] G. W. VON LEIBNIZ, _Memoires Academie_ (Paris, 1682); _Akademie der
Wissenschaften, Miscellanea Berolinensia_ (Berlin, 1710), vol. 1, p. 91.

[6] JEAN HELLOT, _Memoires Academie 1737_ (Paris, 1766), under date of
November 13, 1737, pp. 342-378.

[7] MACQUER, op. cit. (footnote 3), p. 551.

[8] A. S. MARGGRAF, _Akademie der Wissenschaften, Miscellanea
Berolinensia_ (Berlin, 1743), vol. 7, 342 ff.; see also WILHELM OSTWALD
_Klassiker der Exakten Naturwissenschaften_ (Leipzig: Engelmann, 1913),
no. 187.

[9] G. HANCKEWITZ, [Hankwitz], _Philosophical Transactions of the Royal
Society of London_, 1724-1734, abridged (London, 1809), vol. 7, pp.
596-602.

[10] ANTOINE LAURENT LAVOISIER, "Sur la Combustion du Phosphore de
Kunckel, Et sur la nature de l'acide qui resulte de cette Combustion,"
_Memoires Academie 1777_, (Paris, 1780), pp. 65-78.

[11] GUYTON DE MORVEAU and others, _Methode de Nomenclature Chimique_,
Proposee par MM. de Morveau, Lavoisier, Bertholet, & de Fourcroy (Paris,
1787), plate 9.

[12] MACQUER, op. cit. (footnote 3), p. 513.

[13] MARIE BOAS, _Robert Boyle and Seventeenth Century Chemistry_ (New
York: Cambridge University Press, 1958), p. 226; see also WYNDHAM MILES,
"The History of Dr. Brand's Phosphorus Elementarus," _Armed Forces
Chemical Journal_ (November-December 1958), p. 25.

[14] ARCHIBALD CLOW and NAN L. CLOW, _The Chemical Revol