Let $L$ be the Lazard's universal ring, and $R=\mathbb{Z}[b_1,b_2,\cdots,b_n,\cdots]$, regarded as a graded ring with the degree of $b_i$ equal to $2i$. Let $\theta: L\rightarrow R$ be the homomorphism carrying the universal formal group law $\mu^L$ to the formal group law
$$\mu^R(x_1,x_2)=\exp(\log(x_1)+\log(x_2)),$$
where the power series 
$$\exp(x)=x+\sum_{i\geq 1}b_ix^{i+1},$$
and $\log(x)$ its inverse, denoted as
$$\log(x)=x+\sum_{i\geq 1}m_ix^{i+1}.$$
Let $MU$ be the complex cobordism spectrum, and by Quillen's theorem we have the following commutative diagram
$\require{AMScd}$
\begin{CD}
L @>\theta>> R\\
@V \cong V V @VV \cong V\\
\pi_*(MU) @>>h> H_*(MU;\mathbb{Z})
\end{CD}

where $h$ is the Hurewicz homomorphism. 

In Section 7, Part II of 

<cite authors="Adams, J. F.">_Adams, J. F._, Stable homotopy and generalised homology, Chicago Lectures in Mathematics. Chicago - London: The University of Chicago Press. X, 373 p.  3.00 (1974). [ZBL0309.55016](https://zbmath.org/?q=an:0309.55016).</cite>**

it is stated that the class $[\mathbb{C} P^n]\in\pi_*(MU)$ is sent to $(n+1)m_n\in H_*(MU;\mathbb{Z})$ by $h$, and it is indicated there that the argument is a Chern number computation, but I am not seeing the argument.**

I would greatly appreciate your help if you could sketch the proof or point out a reference containing a proof. Thank you!