قام راوس بالترشيح أخذ السائل الذي حصل عليه بعد ترشيح الورم، وحقنه في دجاجة أخرى، فحصل على ورم آخر.
So, he made a filtrate, he took this filter which was the liquid after he passed the tumor through a filter, and he injected it to another chicken, and he got another tumor.