by Joel Rich
Iyunim B’Hilchos Shabbos – Winter Zman-2020
HaRav Asher Weiss-יסוד מלאכת זורע ובישול
Zorea and mvashel are both mlachot whose results are not immediate, but are they existentially equivalent? (e.g., taking the pot off the fire has a similar halachic result to uprooting the planting). R’Weiss thinks they are not existentially equivalent because cooking results are more immediate and certain. (So cooking is results oriented vs. zorea more a process.)
HaRav Zev Smith-מלאכת סחיטה
Schita is a tolda of mfareik. Is it limited to only certain fruits on a torah basis? Is it limited to only those situations where those fruits are usually used for juice? What if there never is a separate juice formed?
HaRav Michoel Frank-מלאכת טוחן
Does tochein require an elemental change in the object? Which materials are covered? Does it need to be done in a “normal” way to be prohibited?
HaRav Meir Tzvi Spitzer-מלאכת דש
Does dash only apply to things that grow from the ground? Major focus on Rambam/cow milking.
HaRav Asher Weiss-יסוד מלאכת דש
Conceptual basics of mlechet Shabbat working up the food storage/preparation chain. Dash is about separation in preparation for storage.
HaRav Elya Brudny-דברי חיזוק
Chinuch is important!
HaRav Avi Weisenfeld-הפולמס על
“Baby Wipes “
Detailed explanation why R’Weisenfield thinks there’s a market opportunity (i.e., current baby wipe products usage on Shabbat is assur).
HaRav Shlomo Cynamon-מה בין דש לבורר: רוח מסעיות
Zoreah, boreir and mlacha shein tzricha lgufa – quantum entanglement?
HaRav Shlomo Gottesman-החלב של החזון איש: פרק בהסטריה של הלכה
History of psak concerning milking on Shabbat from the early Zionist period through today. Players include R’Kook, Chazon Ish, R’SZA and more. Issues include: What mlacha is milking (is it duraita or drabanan)?; What is the status of milking by non-ben brit or machine (differing types)?; Grama; Holech libud, Tzaar baalei chayim; and Hefsed mruba.
HaRav Asher Weiss-יסוד מלאכת בורר
Is borer about separation or tikkun ochel? All mlachot are really tikkun, the question is, is it derech achila or derech mlacha? Another key is to define taarovet.
HaRav Zev Smith-The Underlying Concepts of Borer – Part I:דרך אכילה ובורר לאלתר
Why is boreir allowed if the three conditions are met? It’s about derech achila vs. tikkun achila. Lots of specific applications on defining immediacy, also defining taarovet is an issue.
HaRav Shraga Kallus-בורר: תנאי מלאכת בורר וגדר מיד
Defining the lalter requirement for not violating borer. Is it a function of “normal” preparation time and place? Practical cases discussed.
HaRav Asher Weiss-הגדרת מלאכת מבשל
R’Weiss defines bishul as heat/fire for tikkun.
HaRav Zev Smith-The Underlying Concepts of Borer – Part II
Me – The challenge in borer is while the basics of borer (Ayil or Ochel myad byad) are clear, there’s a lot of debate about the exact definition and applications.
Discussed here – taarovet, edibility, peelers, wrappers, derech achila . . .
HaRav Meir Tzvi Spitzer-יסוד מעשה בישול
There’s a difference between bishul on Shabbat (bringing to an edible state) and basar vchalav (change in physical state).
HaRav Nisan Kaplan-בישול בחמה: דוד שמש
It’s generally accepted that a dude shemesh can’t be used on Shabbat but it requires analysis as to whether it’s a Torah or rabbinic prohibition and whether it would make a difference how common it is.
HaRav Shraga Kallus-Bishul: Prevalent Cholent Issues
Bishul is a change in any item through heat. Lots of chulent examples.
HaRav Asher Weiss-Microwave and Alternate Forms of Bishul
Bishul is all about process. Major applications are Shabbat, basar vchalav and Pesach. The mlacha of bishul always requires a “normal” heat source. It’s not like klachar yad which can change in time and place.
Basar vchalav may be based on taste as well as process.
Interesting is R’Weiss’s comments on R’Moshe’s methodology of psak.
HaRav Refoel Kahn-Stirring The Pot: מגיס
What’s the issue with magis (stirring)? Is it only when the pot is on the fire? Is using a fork to get some meat out of the chulent OK but not a spoon?
HaRav Shraga Kallus-Overview of Bishul Principles and Cases
It’s best to cook everything fully before Shabbat! Then on to is there bishul achar bishul bdavar lach and a number of possible issues (and possible heterim) with adding water from an urn to your Shabbat chulent.
HaRav Chaim Meir Roth-בישול אחר אפיה וצליה
Karban Pesach/Matzah cooking gemara as a paradigm for the questions of whether there is bishul achar tzli or afia on Shabbat? Practical applications include croutons in soup.
HaRav Zev Smith-Bishul Problems and Cases
Primary focus on the Shabbat of mixing of liquids of different temperatures; including kli rishon, sheini, shlishi and kalei bishul.
HaRav Asher Weiss-קלי בישול: Coffee and Tea
Kalei bishul (TBD), kli sheini, irui, lach, yaveish, and kli shlishi. How does this affect putting salt or challah into soup or making coffee??
HaRav Yitzchok Rothstein-קלי בישול
Why isn’t kli sheini mvushal? Tosfot says because of the physical properties of the walls. How does this apply to dishes, ladles, et al? Do the materials in play make a difference? A number of applications discussed.
HaRav Asher Weiss-גדרי טכנולגי’ בשבת
All the usual possible sources on thought/voice control (e.g., maan, locheish . . . )
How much do mlachot have to mirror how they were done in the mishkan? Understanding the difference between klachar yad and shinui mlacha.
HaRav Avrohom Schorr-דברי חיזוק
Now is the time (pre-moshiach) to elevate our emunah.
HaRav Asher Weiss-39 Melachos:How Are They Similar To The Mishkan?
How closely do we follow the mlachot in the mishkan for defining mlachot on Shabbat? Were there really only 39 mlachot in the mishkan? Must mlachot today be exactly the same as done in the mishkan?
Harav Shmuel Fuerst-עיונים בשיטת הרב משה זצ”ל – בישול
Does water directly from the urn give the receiving utensil a status of kli rishon? Do coffee and tea require a kli shlishi? What is the status of water droplets in cups or covers when it comes to reheating?
HaRav Yitzchok Frankel-Rav Moshe on Permissible Carrying in Rishus HaRabbim
Wearing clothes isn’t considered carrying but how do we define clothes? 1.) malbush – protects/warms 2.) beauty (jewelry) 3.) comfortable (like shoes support) 4.) glasses (they serve me) 5.) support (crutches). You also must wear it “derech malbush.”
HaRav Yitzchok Koslowitz-עיונים בפסקי רב משה ורב דוד זצ”ל – שבת
Bishul achar bishul, nitztanein lgamrei and applications for cups and ladles.
HaRav Dovid Zucker-כותב אות אחת
Analysis of the concept of chatzi shiur.
HaRav Asher Weiss-הקדמה: מלאכת כותב
Kdarko bkodesh R’Weiss lays out the parameters of koteiv (letters or words?) and differentiates between koteiv (form) and tzoveah (coloring). We also differentiate between a chatzi shiur (e.g., you did write, but just one letter) vs. chatzi mlacha (e.g., you picked an object up but didn’t put it down).
HaRav Shraga Kallus-עיונים בכותב ומוחק
Is writing with the weaker hand an issue of not being mlechet machshevet or is it not the mlacha of koteiv because that requires a certain level of skill/art? If the latter, it would have implications for safrut as well.