May 1907.] 



289 



Timbers. 



Appendix I,— Patents. 

 As will be understood, a very large number of patents have been taken out 

 by those concerned in ^he development of wood pulp making, and in importance 

 relating to the same. The following may be taken as covering some of the most 

 important patents from 1867, when Tilghman was granted the initial patent : — 



1905, 



Archbold, George, 

 Biron, Jean B. 

 Ekman, Carl D. 



Francke, Uavid Otto, 



1883 ; manufacture of paper pulp. 



1867; disintegrating wood x>o form pulp, &c. 



1882 ; treating wood ; method of treating Avood ; 



treating fibrous vegetable substances to obtain 



fibre suitable for paper making. 



1884 ; manufacture of paper pulp. 



Graham, James Anthony, 1883 ; treating of fibrous substances. 



Haskell, J. R, 



1867 



Kellner, Charles, 



Minthorn, Daniel, 

 Mitscherlish, Alex. 

 Do do 



Pictet, R. P. 

 Pond, Goldsburg H. 



1886 



1885 

 1886 



1885 

 1886 



Ritter, Bugen Baron, and 



treating and separating vegetable fibres (not 

 on sulphite process, but his claim covers first 

 steaming the fibres and then condensing steam 

 by shower of cold liquor so as to force 

 liquor into the wood, as in later patents of 

 Mitscherlich. 



method of sizing paper to prevent the sulphite 

 and ground pulp from turning yellow. (He 

 precipitates the rosin size with a sulphite salt). 

 ; treating vegetable fibre, 

 boiling fibres w T ith sulphite ; paper pulp (pro- 

 cess for manufacturing) ; 1889, manufacturing 

 thread from short fibre, 

 manufacture of pulp from wood matter, 

 manufacture of paper pulp from wood ; 

 machine for manufacture of wood pulp ; manu- 

 facture of wood pulp. 



Carl Kellner, 



1885 



Do 



Tilghman, B. C. 



do 



1896 : 

 1867 



apparatus and manufacture of cellulose from 

 wood ; progress of manufacturing cellulose, 

 progress for manufacturing sulphites, 

 treating vegetable substances for making paper 

 pulp ; 1869, process of treating vegetable sub- 

 stances to obtain fibre. 



Wheelwright, Charles S. 



and George E. Marshall, 1884 ; apparatus for treating wood. 

 II.— The pulp imported into Great Britain during the month of April, 

 was : — 



Quantities. 



Month ended 30th April. 



Four months ended 30th April. 



Mechanical :— 

 Dry 

 Wet 



1903. 

 Tons. 



473 

 26,666 



1904. 

 Tons. 



228 

 19,145 



1905. 

 Tons. 



628 

 15,770- 



1903. 

 Tons. 



2,284 

 81,953 



1904. 

 Tons. 



2,548 

 86,597 



1905. 

 Tons. 

 2,168 

 60,538 



Total 



27,139 



19,373 



16,398 



84,237 



89,145 



62,706 



Chemical :— 

 Dry 

 Wet 



14,226 

 3,745 



.11,478 

 1,859 



13,650 

 985 



51,983 

 7,949 



46,215 

 8,049 



53,149 

 6,260 



Total 



17,971 



13,337 



14,635 



59,932 



54,264 



59,409 



Total of Pulp of 

 Wood 



45,110 



32,710 



31,033 



144,169 



143,409 



122,115 



