When people talk about "pre-industrial temperature", should they start with the low at the end of the Little Ice Age, then assume that CO2 is the reason for any additional warmth?

Irish Famine of ’40 « Musings from the Chiefio

that of 1740–41 was due to extremely cold and then rainy weather in successive years, resulting in a series of poor harvests. Hunger compounded a range of fatal diseases. The cold and its effects extended across Europe, and it is now seen to be the last serious cold period at the end of the Little Ice Age of about 1400–1800.

industrial revolution: Definition from Answers.com

The Industrial Revolution was largely confined to Britain from 1760 to 1830 and then spread to Belgium and France.