Hello Rick, Although I have done some research onto Dow lines, my main source of information on lines other than my own is "The Book of Dow" by Robert Piercy Dow.
The book has 2 lines with Albert Gallatin Dow. The one with the dates you gave was an Albert Gallatin Dow b. 12 Nov 1809 in CT. He moved to Ohio and married Mary Hamilton. Their son Albert Gallatin Dow was b. 15 July 1845. He had a son also named Albert Gallatin Dow b. 5 Jan 1872.
Another Dow line has an Albert Gallatin Dow b. Aug 1808.He had a son Albert Gallatin Dow b. 17 April 1844. I mention him only so that in your research you don't mistake one for the other in census records.I'd be happy to supply the whole line for Albert. Please e-mail me directly for the details.