Ill 



A few additional boundary curves of species will be shown later, if convenient, 

 and I only wish that the aspiration of Dr. Robinson to see the curves of a " few hundreds 

 of our best defined species " could be realised. It would give a great impetus to botanical 

 science if the curves of say three hundred species of Eucalyptus could be given, but that 

 must remain a pious hope for the future. I have a large mass of data on the subject 

 already accunmlated in this work, but considerations of time and expense are involved, 

 and they are insuperable at present. 



Other branches of the subject of Eucalyptus have also had to be laid aside. I 

 especially regret the practical abandonment of the curving bomidaries, as I wished to 

 work out some of the interesting generalisations that study of them has in store for 

 the investigator. 



4. The relation between wheat-growing and rainfall, particularly as regards— 

 a. New South Wales (compared with the E. albens line.) 



The Common wealth Meteorological publication of Hunt, Taylor and Quayle 

 (1913), has already been cited, as regards its importance to rainfall problems. 



We also turn to " The Australian Environment " (especially as Controlled by 

 Rainfall) [my italics], by Griffith Taylor, being Memoir No. 1 of the Advisory Council 

 of Science and Industry (1918). This important memoir largely deals with rainfall, 

 as its title indicates. 



The phenomenon which most strikingly, and universally perhaps, exhibits climatic control is the 

 earth's covering of vegetation. 



This is a quotation from Bonacina, by Griffith Taylor, who puts the position as 

 follows : — 



The natural vegetation is the chief response of nature to rainfall, and is very closely bound up with 

 the season and abundance of the rain. 



See also : ' Distribution of the Eucalyptus " by Howitt in Trans. Roy. Soc., Vict., 

 ii, 104. This portion of the paper has been already referred to under " Altitude " 

 (Part LXVII, p. 338). with which of course it is inseparably bound up. 



"Physical Geography and Climate of New South Wales," 2nd Edition (1892), 

 by H. C. Russell, F.R.S., is one of the most valuable of the earlier pamphlets. 



In Agric. Gaz., N.S.W., for January, 1905, Mr. T. A. Coghlan, Government 

 Statistician, published a " Memorandum regarding Area of New South Wales Suitable 

 for Wheat-growing," which was illustrated by a " Diagram map of N.S.W. showing the 

 area in which Agriculture can be carried on under favourable conditions of rainfall." 

 It contains a solid " Crop-line (based on actual results) " and a dotted " Theoretic (Rain) 

 line.''" The former line is defined in detail, and represents the westward limit of profitable 

 wheat-growing based upon actual results (see pp. 1 — 3). The " rain " line is referred 

 to at p. 4. Compare 1912 (Trivett). 



In " Wheat-growing in Relation to Rainfall/' John B. Trivett, Agric. Gaz., N.S.W. , 

 xxiii, 737 (September, 1912), has a map of New South Wales, bearing three lines in 

 black, red and blue, as follows : — 



Black, limit of 10 inch rainfall (Hunt's line) fiom April to October, inclusive (the 



growing period for wheat). 

 Red. Wheat experience line (Coghlan 's solid line, 1904). 

 Bbxe. Wheat experience line, 1912. 



32719- G 



