8 Let $X=\{1,2, \cdots, 1995\}, A$ be a subset of $X$, such that when $x \in A$, $19 x \notin A$. Find the maximum value of $|A|$.

When $x \in A$, $19 x \notin A$.
8. Let $A_{k}=\{k, 19 k\}, k=6,7, \cdots, 105$, then $A$ contains at most 1 number from each $A_{k}$, so $|A| \leqslant 1995-100=1895$. On the other hand, let $A=\{1,2,3,4,5\} \cup$ $\{106,107, \cdots, 1995\}$, then $A$ meets the requirement, and in this case $|A|=1895$. Therefore, the maximum value of $|A|$ is 1895.