Ixx Instructions to Scientific Observers, ^c, 



opportunity offers, tliough withoiit interfering -with tlie main object 

 of the Expedition. 



13. The work connected with the topographical survey requires 

 hardly any further remarks, but that everything should be done as 

 minutely and accurately as possible, and that all more strictly called 

 scientific observations should be subordinate to the mapping of the 

 country. 



(JEOLOGICAL, MINERALOGICAL, AND NATURAL HISTORY 

 OBSERVER. 



GEOLOGY. 



Diary to be kept regularly, and all observations made during the 

 day to be entered before the next day, and as soon as possible after 

 the camp is pitched for the night, and the necessary duties connected 

 •with camping, attention to stock, &c., are completed. This to be, in 

 in all cases, determined by the Leader. 



General Heads of Diary — 



1. Distance and course travelled. 



2. Number, character, distance apart, and general trend or fall of 

 all watercourses or drainage channels crossed. 



3 . Quality of water, if any, in such courses or channels. To ascer- 

 tain the nature of the salts in saline or other mineral waters, a 

 certain quantity might be evaporated, and the deposited matter col- 

 lected for chemical examination. 



4. Mode of occurrence of water : springs, lakes, pools, or running 

 streams, with average depth of ditto. 



5. Indications relative to probable permanence or otherwise of 

 ditto, also of periodical floods. 



G. Geological, physical, and mineral character of the banks and 

 beds of streams, lakes, &c., and also of the intervening and adjacent 

 country. If composed of tertiary deposits of mud, clay, sand, or 

 gravel, note nature of such, whether stratified or irregular accumula- 

 tions, also mineral character, stating the nature and relative propor- 

 tions of the materials, whether limestone, sandstone,' quartz rock, 

 quartz, or other rock fragments, sedimentary or igneous, or much 

 waterworn. If composed of removed rocks, state probable geological 

 age of such ; if stratified and undoubtedly in situ, average direction 

 and angle of dip (noted thus: D. N. 10° E. 15°), also probable thick- 

 ness and relative geological position of different formations (con- 

 formable or otherwise) of igneous rocks, whether intrusive or 

 contemporaneous. 



7. Indications or presence of organic remains to be carefully 

 sought for and noted, also of mineral veins, coal seams, lignite beds, 

 ♦fee. ; date and locality of such researches, with the time so occupied 

 to be stated. 



