Complex sentence: Although the title page says it was taken "from the Encyclopædia Perthensis" this does not appear to be the case, as this work is 7 volumes of around 650 pages each, while the former work was 23 volumes of 800 pages each.
Split into simpler sentences: Although the title page says it was taken "from the Encyclopædia Perthensis" this does not appear to be the case. This work is 7 volumes of around 650 pages each, while the former work was 23 volumes of 800 pages each.