How is the Cambrian divided ? ATS 
of saccharine will sweeten as much water as a barrel of 
sugar. 
All sugar makers felt very uneasy when this came to 
light, but now it is known that itis harmful inits properties 
and valuable only as a medicine, those who own the five 
hundred million dollars invested in sugar in this world 
breathe again. 
How Is THE CAMBRIAN DIVIDED ?—A PLEA FOR 
THE CLASSIFICATION OF SALTER AND Hicks.’ 
By G. F. Marruew, M.A.; F.R.S.C. 
A new classification of the Cambrian system has lately 
,been proposed by Mr. C. D. Walcott, the well-known 
palzontologist of the United States Geological Survey and 
has received the assent of Prof. Chas. Lapworth. The most 
prominent feature of this classification is the basal position 
given to the Olenellus fauna which no doubt is in accord- 
ance with facts. Another point in this classification is the 
placing of the rocks containing the Paradoxides fauna as 
Middle Cambrian; with this the knowledge at present be- 
fore the writer does not seem to agree. A while ago it 
seemed as though the Cambrian system was divided 
palzontologically into three sections, the Paradoxides beds, 
the Lingula flags and the Tremadoe or Ceratopyge beds, 
which would thus be the Lower, Middle and Upper Cam- 
brian, But this “‘ Upper” Cambrian was not only weak in 
bulk of measures, but in the genera it contained it exhibited 
a strong paleontological affinity to the Ordovician forms, 
so strong, indeed, that by many Huropean geologists it was 
classed as a part of the “ Lower Silurian” system. 
The discovery by Mr, Walcott of many of these so-called 
Ordovician forms, low down in the Cambrian strata of the 
tocky mountain region, shows that a different interpreta- 
' From the American Geologist, September, 1889, 
