I have the following sentence from Euler's De Serie Lambertina (I've already asked half a dozen questions about this paper), and one of the words manuducant (manvdvcant), shown in the snippet below, doesn't seem to be a word as written.
It seems like the sentence reads
Operationes analiticas exponere, quae ad cognitionem verae summae seriei Lambertinae manuducant.
Which translates to
Set forth the analytical operations, which [manuducant] to the understanding of the actual sum of the Lambert series.
As I see it, the word relates to duco, so it would be something like "which leads to the understanding...", but I'm unsure of the intention here, maybe "manu ducant"?