What does it mean to say that "as far as practicable, there shall be uniformity in the scale of representation of the different States at the election of the President"?
It means that, to the extent possible, the system of electing the President should ensure that each State's representation is as equal as can be. This would involve balancing the number of votes allocated to elected members from different States based on their population size and the total number of elected members in each State's Legislative Assembly. The goal is to create a fair and balanced process for electing the President.