The on-line Portable Document Format (PDF) version of the "Official History of the Canadian Army in the First World War", by Colonel G.W.L. Nicholson, C.D., is a tremendous reference to anyone researching Canada's participation in the Great War.
There are a few problems with the PDF version:
Some of these have been addressed:
The maps have been scanned by Richard Laughton and are available here.
Appendix C contains 4 tables. Note that the transcriptions have corrected errors in the original and have been reformatted to be more web friendly. A Microsoft Excel spreadsheet with all the data is available for download here.
Table 1: Appointments and enlistments by months can be found here.
Table 2: Strength at end of each month from 30 September 1914 to 30 November 1919 can be found here.
Table 3 : Fatal Casualities by Theatre and Category can be found here.
Table 4: Non-Fatal Casualties by Arm of Service and Category can be found here.
A spreadsheet with the data, formatted similar to Nicholson's original can be downloaded here.
The following images of the pages from the original (French) version were made available by Chris Wight: