Nidah Chart #8a

TUM'OS OF A ZAV, ZAVAH, NIDAH, OR YOLEDES

	(A) WHILE IT IS STILL TOUCHING (OR OVER, OR UNDER) THE ZAV	(B) AFTER IT IS REMOVED FROM THE ZAV
HA'NOGEI'A BO
1a) IF A *PERSON* TOUCHES A ZAV	Rishon, but he is Metamei Begadim (2)	Rishon
1b) IF *KELIM* TOUCH A ZAV	Rishon	Rishon
TACHTON D'ZAV
2a) IF A *PERSON* IS PLACED UNDER A ZAV	Rishon, but he is Metamei Begadim (2)	Rishon
2b) IF *KELIM USED FOR SITTING ON* ARE PLACED UNDER A ZAV (MISHKAV & MOSHAV) (1)	Metamei Adam l'Tamei Begadim (3)	Metamei Adam l'Tamei Begadim (3)
2c) IF *OTHER KELIM OR FOOD* ARE PLACED UNDER A ZAV	Tehorim (7)	Tehorim (7)
ELYON D'ZAV
3a) IF A PERSON IS PLACED ON TOP OF A ZAV	Rishon	Rishon
3b) IF KELIM OR FOOD ARE PLACED ON TOP OF A ZAV (4)	Rishon (5)	Rishon

Nidah Chart #8b

TUM'OS OF A BO'EL NIDAH

	(A) WHILE IT IS STILL TOUCHING (OR OVER, OR UNDER) THE BO'EL NIDAH	(B) AFTER IT IS REMOVED FROM THE BO'EL NIDAH
HA'NOGEI'A BO
4a) IF A *PERSON* TOUCHES A BO'EL NIDAH	Rishon, but he is Metamei Begadim (2)(6)	Rishon
4b) IF *KELIM* TOUCH A BO'EL NIDAH	Rishon	Rishon
TACHTONO
5a) IF A *PERSON* IS PLACED UNDER A BO'EL NIDAH	Rishon	Rishon
5b) IF *KELIM USED FOR SITTING ON* ARE PLACED UNDER A BO'EL NIDAH (MISHKAV & MOSHAV) (1)	Rishon	Rishon
5c) IF *OTHER KELIM OR FOOD* ARE PLACED UNDER A BO'EL NIDAH	Rishon	Rishon
ELYONO
6a) IF A PERSON IS PLACED ON TOP OF A BO'EL NIDAH	Tahor	Tahor
6b) IF KELIM OR FOOD ARE PLACED ON TOP OF A BO'EL NIDAH (4)	Tahor	Tahor

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FOOTNOTES:
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(1) Every Kli that is made for sitting on (that is, if one sits on it, people do not say to him, "Get up so that we can do our work [with that Kli]," except for a Klei Cheres (earthenware vessel) which cannot be designated for sitting or lying upon.

(2) Even though a normal Rishon l'Tumah is only Metamei foods and liquids (Ochlin v'Mashkin), these Kelim -- when they are touching the Zav -- will be Metamei Klei Shetef (that is, all types of utensils other than Klei Cheres).

(3) The Din of Mishkav and Merkav is the same as the Din of Zav itself. The only difference is that the Zav makes the Kli under it into a Mishkav, and Mishkav does not make whatever is under it into a Mishkav.

(4) Tosfos in Eruvin (27a, DH Kol she'Nisa) has a doubt that perhaps we require specifically something that is fit for this type of usage. The Ritva in our Sugya writes that this indeed is the halacha, that this Din applies only to something that is specifically made for spreading over a person; any other Kli, though, would be Tahor.

(5) According to the Ra'avad (Hilchos Mishkav u'Moshav 6:3), these Kelim will be Metamei Begadim (while they are still on top of the Zav (-Achronim)), just like a person touching a Zav or underneath a Zav.

(6) The Mishnah l'Melech (beginning of chapter 3, Hilchos Mishkav u'Moshav) cites an opinion that argues and holds that this is a normal Rishom l'Tumah and it will not be Metamei Begadim.

(7) This is clear from Maseches Zavim 5:2. However, Tosfos in Eruvin (27a, DH Kol) writes in the name of Rabbeinu Tam that they are Tahor only with regard to being an Av ha'Tumah, but they are Tamei as a Rishon l'Tumah to be Metamei Ochlin u'Mashkin. This also appears to be the opinion of Rashi (NIdah 54b, DH Hi, see Insights later to Daf 49b). (Rashi in Shabbos 83b, however, writes that they are completely Tahor, like all the other Rishonim