But the most rigorous application of the doomage law has only proved its complete futility as an effort to reach unascertained corporate and personal property.'
And it must be admitted that there are also many cases, some of them caused by irregularities of writing, modification of spelling by decay, and by a probable use of prefixes still unascertained, which also resist explanation, though the account just given stands good whatever solution the question of prefixes may receive in future.
The fact that conduction occurred preponderantly in certain directions was explained by appeal to a hypothetical resistance to conduction which, for reasons unascertained, lay less in some directions than in others.
How would you define unascertained? Add your definition here.