You can use 7zip to split files.
WINDOWS Download here:
32-bit .exe ------ http://downloads.sourceforge.net/sevenzip/7z465.exe
x64 .msi ----- http://downloads.sourceforge.net/sevenzip/7z465-x64.msi

UBUNTU goto Applications > Ubuntu Software Center --- Then type 7zip in search bar and install

Here is a Pdf Called
Easy Gardening for the Inland Northwest
You will need all 3 parts downloaded in order to see the file from the 7zip extraction. Then you can save it as PDF
Hope this helps in the future if you need to upload Bigger files than 1.9 MB

I will get to splitting PDF's to upload to archives.org as soon as I can edit a project that I need help with. I was lent a 1941 110 page 8x11 magazine format publication by Morton promoting the use of their quickcure product called "Meat Curing made easy".

I scanned this piece into a PDF compilation and afterwards found that several pages for various reasons needed to be re-scanned. The problem is there is no way to edit it with anything I've got. I can't go in and replace a page, I would have to re-scan the entire booklet, being hours. How can I fix this?