As far as I know there are 4 ways for a central bank to create money: printing legal tender, buying government securities (bonds, treasury bills, etc.), advances (loans) to chartered banks, and government deposit shifting (from the central bank account to a chartered bank account). There's also the option of drawing upon foreign reserves or the reserves of chartered banks (assuming the country in question has reserve requirements, Canada doesn't anymore). So I examined those five activities from 1938 to 1946. Here are my main findings.
- Dramatic increase of notes in circulation - five-fold from 1939 to 1945
- Dramatic increase of purchasing of government securities - eight-fold from 1939 to 1945
- Occasional small advances to chartered banks
- Minor changes in government deposits at chartered banks (now shown below)
- Some variation in foreign reserves, presumably used for temporary war funding
The two methods the BoC chose, printing money and buying bonds, are the most effective ways of injecting money into the economy in my opinion because giving a chartered bank money doesn't guarantee that they'll loan it out or that they would have enough credit-worthy borrowers, where as giving money directly to the government guarantees that it will be spent into existence. Using reserves is a short term, unsustainable strategy but at least the money goes straight to the government.
Statements of Assets and Liabilities
September 28, 1938 (72-2, pg. 920)
Notes In Circulation: $174,132,964.18
Reserve Total: $214,306,415.79
Advances: N/A
Investments Total: $194,857,867.48
June 21,
1939 (72-4, pg. 3106)
Notes In Circulation: $165,036,073.70
Reserve Total: $251,575,234.96
Advances: N/A
Investments Total: $159,882,240.69
September 30, 1939 (73-2, pg. 1187)
Notes In Circulation: $212,489,653.08
Reserve Total: $270,123,157.37
Advances to Chartered Banks: $1,000,000.00
Investments Total: $218,642,068.92
December 27, 1939 (73-2, pg. 2050)
Notes In Circulation: $232,677,657.47
Reserve Total: $292,585,383.25
Advances: N/A
Investments Total: $227,245,767.70
March 27, 1940 (73-3, pg. 3116)
Notes In Circulation: $221,110,318.22
Reserve Total: $292,348,545.00
Advances: N/A
Investments Total: $212,689,247.34
July 3, 1940 (74-1, pg. 44)
Notes In Circulation: $279,162,593.35
Reserve Total: $2,755,544.06
Advances to Chartered Banks: $3,500,000.00
Investments Total: $541,045,191.26
September 4, 1940 (74-1, pg. 808)
Notes In Circulation: $312,955,496.60
Reserve Total: $14,263,687.42
Advances to Chartered Banks: $1,000,000.00
Investments Total: $555,599,509.12
November 13, 1940 (74-2, pg. 1750)
Notes In Circulation: $334,745,498.85
Reserve Total: $65,175,656.99
Advances: N/A
Investments Total: $575,701,921.87
March 1, 1941 (74-4, pg. 3117)
Notes In Circulation: $350,311,461.23
Reserve Total: $51,027,330.25
Advances: N/A
Investments Total: $569,325,683.63
June 4, 1941 (74-5, pg. 4370)
Notes In Circulation: $382,673,945.48
Reserve Total: $220,730,215.07
Advances: N/A
Investments Total: $497,841,285.35
January 21, 1942 (75-3, pg. 2824)
Notes In Circulation: $478,789,998.22
Reserve Total: $263,571,841.15
Advances: N/A
Investments Total: $472,725,161.72
January 6, 1943 (77-1, pg. 161)
Notes In Circulation: $689,865,818.86
Reserve Total: $499,191.73
Advances to Chartered Banks: $1,250,000.00
Investments Total: $1,016,400,722.18
January 5, 1944 (78-1, pg. 159)
Notes In Circulation: $874,696,877.50
Reserve Total: $558,336.23
Advances: N/A
Investments Total: $1,268,813,537.30
January 10, 1945 (79-1, pg. 181)
Notes In Circulation: $1,030,521,574.40
Reserve Total: $172,257,272.83
Advances: N/A
Investments Total: $1,525,456,241.73
August 29, 1945 (79-5, pg. 3873)
Notes In Circulation: $1,094,644,410.81
Reserve Total: $204,679,962.33
Advances: N/A
Investments Total: $1,635,214,166.69
January 9, 1946 (80-1, pg. 187)
Notes In Circulation: $1,115,578,750.41
Reserve Total: $156,830,762.18
Advances: N/A
Investments Total: $1,869,440,420.55
Other data
Statement 1938 & 1939 (73-2, pg. 1189-1191)
Interest on Public Debt: (1937 - 1938) $132,117,421.58; (1938 - 1939) $127,995,616.75
Total Ordinary Expenditure: (1937 -1938) $414,891,410.41; (1938 - 1939) $413,032,202.44
So from 1937 to 1938 the interest on the public debt amounted to 31.84% of the total ordinary expenditure, and from 1938 to 1939 it accounted for 30.98%.
Receipts Sept 1939 (73-2, pg. 1192)
Ordinary Expenditure
Interest on Public Debt: (Sept. 1939) $6,075,018.44
National Defence: (Sept. 1939) $2,651,460.57
Pensions and National Health: (Sept. 1939) $4,909,330.52
Notice how interest on debt is the largest expenditure (I didn't include all expenditures).
References
Canada Gazette - CA1YX99 G191 (Robarts Library):
72-2, 1938
... : 72-4, 1939
... : 73-2, 1939
... : 73-3, 1940
... : 74-1, 1940
... : 74-2, 1940
... : 74-4, 1941
... : 74-5, 1941
... : 75-3, 1941 - 1942
... : 77-1, 1943
... : 78-1, 1944
... : 79-1, 1945
... : 79-5, 1945
... : 80-1, 1946